Best Submersible Aquarium Filters: Clear Water, Happy Fish

Remember that time you brought home that adorable little betta, convinced you could provide the perfect aquatic paradise? Only to be met with cloudy water, constant algae blooms, and a general feeling that your fishy friend deserved better? We’ve all been there! Maintaining a healthy and thriving aquarium is more than just pretty gravel and colorful decorations. It’s about creating a balanced ecosystem, and a vital component of that balance is proper filtration. That’s why choosing the right filter is crucial, and for many aquarists, especially those with smaller tanks or those just starting out, submersible filters are the perfect solution.

So, if you’re tired of murky water and searching for a discreet and effective way to keep your aquarium sparkling, you’ve come to the right place! This guide is dedicated to helping you navigate the world of submersible filters and discover the best submersible aquarium filters for your specific needs. We’ll break down the different types, features, and considerations, and provide honest reviews of some of the top-rated models on the market. Get ready to say goodbye to aquarium woes and hello to a crystal-clear underwater world!

Before moving into the review of the best submersible aquarium filters, let’s check out some of the relevant products from Amazon:

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Table of Contents

Diving Deep: Finding the Right Filter for Your Underwater World

So, you’ve got a beautiful aquarium bubbling with life – maybe some colorful tetras darting amongst the plants, or a majestic betta ruling his castle. But beneath that serene surface, a silent battle is being waged against waste and debris. Maintaining a healthy aquarium environment is crucial for your aquatic friends’ well-being, and that’s where a good filter comes into play. Think of it as the unsung hero of your tank, constantly working to keep the water clean and clear.

Now, when it comes to aquarium filters, the options can feel a bit overwhelming. One popular and often convenient choice is the submersible aquarium filter. These little powerhouses sit right inside your tank, quietly filtering the water without taking up extra space. According to a recent study, internal filters, which often encompass submersible filters, are favored by nearly 40% of aquarium hobbyists for their ease of use and affordability, especially in smaller tanks.

Choosing the best submersible aquarium filters for your specific needs isn’t just about picking the cheapest option, though. It’s about understanding your tank size, the type of fish you have, and the level of filtration they require. A small tank with a single betta will have different needs than a larger tank bustling with a community of fish. Things like flow rate, filtration stages (mechanical, biological, and chemical), and maintenance requirements all come into play.

Don’t worry, we’re not going to leave you stranded in the deep end! This article is your guide to navigating the world of submersible aquarium filters. We’ll explore the different types, weigh the pros and cons, and help you find the perfect filter to keep your underwater paradise sparkling and thriving. Let’s dive in and find the perfect match for your finned companions!

The Best Submersible Aquarium Filters

Fluval U4 Underwater Filter

The Fluval U4 is a powerhouse for larger tanks, offering multi-stage filtration including biological, chemical, and mechanical. Its adjustable flow rate and spray bar make it incredibly versatile, allowing you to customize the water movement to suit your specific fish and plant needs. Plus, the flip-top lid makes media changes a breeze – no more dismantling the whole filter!

This filter is incredibly quiet, a huge bonus for anyone who keeps their aquarium in a living space. It’s also designed to be easily hidden with suction cups that hold it securely in place. The U4 is a great choice for those who want a reliable and efficient filtration system that won’t disrupt the peace and quiet of their home.

Aqueon QuietFlow Internal Power Filter

If you’re looking for a budget-friendly option that doesn’t skimp on performance, the Aqueon QuietFlow Internal Power Filter is a solid choice. Its self-priming feature is a huge plus, especially for beginners, making setup and maintenance a snap. It’s designed to be compact and unobtrusive, perfect for smaller tanks where space is at a premium.

This filter utilizes a multi-stage filtration system, including a replaceable filter cartridge with activated carbon. This helps to keep your water clean, clear, and free of odors. While it might not have all the bells and whistles of more expensive models, the Aqueon QuietFlow delivers dependable filtration at an affordable price, making it a great value for the money.

Marineland Magnum Polishing Internal Canister Filter

The Marineland Magnum Polishing Internal Canister Filter is a unique offering, particularly well-suited for polishing aquarium water to crystal clarity. Its diatomaceous earth filtration capability is what sets it apart, allowing it to remove even the smallest particles that other filters might miss. If you’re battling persistent cloudiness, this filter could be your solution.

This filter is a bit more involved to maintain than some others, requiring occasional cleaning of the canister and replacement of the diatomaceous earth media. However, the payoff is exceptionally clear water, which can significantly enhance the beauty of your aquarium and the health of your fish. It’s an excellent choice for hobbyists who are serious about water quality.

Sunsun JUP-01 Submersible Filter with UV Sterilizer

The Sunsun JUP-01 offers a two-in-one punch: filtration and UV sterilization. The built-in UV sterilizer helps to eliminate harmful bacteria, algae, and parasites, contributing to a healthier environment for your fish. This is especially beneficial in tanks prone to algae blooms or when introducing new fish.

Beyond the UV sterilization, the Sunsun JUP-01 also provides mechanical and chemical filtration. Its adjustable flow rate allows for customization, and its compact design makes it suitable for a range of tank sizes. While it may not be as well-known as some other brands, the Sunsun JUP-01 is a great value for those seeking both filtration and sterilization in a single unit.

Penn-Plax Cascade Internal Filter

The Penn-Plax Cascade Internal Filter is a reliable and versatile option for a variety of aquarium setups. It features adjustable flow rates, allowing you to customize the water circulation to suit the needs of your tank inhabitants. It’s also designed with a spray bar and directional output nozzle, providing even distribution of filtered water throughout the aquarium.

One of the standout features of the Cascade filter is its easy maintenance. The filter cartridges are simple to replace, and the entire unit is designed for easy access and cleaning. Its compact size makes it suitable for smaller tanks, while its powerful filtration capabilities ensure clear and healthy water for your aquatic pets.

Why Do People Need Submersible Aquarium Filters?

Imagine this: you’ve carefully curated your aquarium, stocked it with vibrant fish and lush plants, and you’re ready to enjoy the serene beauty of your underwater world. But what if your water becomes cloudy, your fish seem sluggish, and algae starts to take over? That’s where a submersible aquarium filter comes in as your unsung hero! These filters are designed to sit directly inside your tank, silently working to keep the water clean, clear, and healthy for your aquatic inhabitants. Think of it like this: your aquarium is a mini-ecosystem, and a filter is the essential janitor that keeps everything running smoothly.

Submersible filters are more than just pretty accessories; they’re crucial for maintaining a balanced and thriving aquarium environment. They effectively remove harmful toxins like ammonia and nitrites produced by fish waste and decaying organic matter, preventing them from building up and harming your delicate aquatic pets. The “best submersible aquarium filters” go a step further by offering multi-stage filtration – mechanical, chemical, and biological – ensuring a truly comprehensive cleaning process. They trap debris, neutralize harmful substances, and promote the growth of beneficial bacteria that break down waste naturally.

Think of the time and effort you invest in feeding your fish and creating a beautiful aquascape. Without a proper filter, all that hard work could be undermined. Regularly cleaning your tank becomes a more frequent and demanding chore, and your fish are constantly exposed to a less-than-ideal environment. A submersible filter significantly reduces the need for frequent water changes, saving you time and effort while providing your fish with a consistently healthy and comfortable habitat. Plus, a happy fish is a vibrant fish, displaying its natural colors and behaviors for you to enjoy!

Ultimately, investing in a submersible aquarium filter is an investment in the long-term health and beauty of your aquarium. The “best submersible aquarium filters” offer a hassle-free way to maintain pristine water quality, ensuring your fish thrive and your aquarium remains a captivating centerpiece in your home. It’s a small price to pay for the peace of mind and the joy of watching your aquatic ecosystem flourish.

Maintenance Tips for Submersible Aquarium Filters

Okay, you’ve got your shiny new submersible filter installed, but the journey doesn’t end there! Like any piece of equipment, these filters need regular TLC to keep them running efficiently and ensure a healthy environment for your fishy friends. Think of it like changing the oil in your car – if you neglect it, things are gonna get messy (and expensive) fast.

First up, and probably the most crucial, is regular cleaning. Debris like uneaten food, plant matter, and fish waste can clog the filter media, reducing its effectiveness and even causing it to overheat. A good rule of thumb is to clean the filter every 2-4 weeks, depending on the bioload of your aquarium. A heavily stocked tank will need more frequent cleaning than a lightly stocked one.

When cleaning, avoid using tap water! Tap water contains chlorine and chloramine, which are harmful to beneficial bacteria that colonize the filter media. These bacteria are essential for breaking down harmful ammonia and nitrites in the water. Instead, rinse the filter media in a bucket of used aquarium water. This will remove debris without killing off those helpful bacteria.

Finally, keep an eye on the filter’s flow rate. A noticeable decrease in flow is often a sign that the filter is clogged and needs cleaning. Regular maintenance not only extends the lifespan of your filter but also ensures a clean and healthy environment for your aquatic pets. Neglecting this can lead to algae blooms, sick fish, and an overall unhappy aquarium.

Troubleshooting Common Submersible Filter Problems

So, your filter is making weird noises, the water’s getting cloudy, or the flow seems weaker than a kitten’s sneeze? Don’t panic! Submersible filters are generally reliable, but like any gadget, they can sometimes run into problems. The good news is that many issues are easily fixable with a little troubleshooting.

One common culprit is a clogged impeller. The impeller is the spinning part of the filter that creates water flow. Over time, debris like hair, plant pieces, or even small snails can get stuck in the impeller, hindering its movement and reducing flow. Usually, you can just remove the impeller and give it a good clean to solve the issue.

Another problem might be an aging or damaged filter media. Over time, the media can break down or become overly saturated with waste. Replacing the filter media periodically can restore the filter’s efficiency. Follow the manufacturer’s recommendations for how often to replace the different types of media used in your specific filter.

Sometimes, the problem might be simpler than you think. Check to make sure the filter is properly submerged. If the water level drops too low, the filter might suck in air, causing it to make noise and lose suction. Topping up the water level can quickly resolve this issue. Remember, a little detective work can save you time, money, and keep your fish happy and healthy!

Choosing the Right Size Submersible Filter for Your Aquarium

Imagine trying to squeeze into clothes that are way too small – uncomfortable, right? The same applies to choosing a filter that’s too small for your aquarium. It just won’t be able to handle the bioload and keep the water clean. But going too big can also be a problem, creating too much current for some fish.

As a general rule, aim for a filter that can turn over the water volume in your aquarium at least 4-6 times per hour. This means that if you have a 20-gallon tank, you’ll want a filter with a flow rate of at least 80-120 gallons per hour (GPH). Always check the filter’s specifications to ensure it meets this requirement.

However, the ideal filter size isn’t just about the tank’s volume. Consider the number and type of fish you keep. Overcrowded tanks or fish that produce a lot of waste, like goldfish, will require a more powerful filter. Similarly, if you have a heavily planted tank, the plants will help to absorb some of the waste, so you might be able to get away with a slightly smaller filter.

Don’t hesitate to round up if you’re unsure. It’s generally better to have a filter that’s slightly oversized than one that’s undersized. An oversized filter will provide more effective filtration and help to maintain a stable water quality. Just be mindful of the current it creates, especially if you have delicate fish that prefer calmer waters.

Exploring Different Types of Submersible Filter Media

Think of your aquarium filter media as the kidneys of your tank – they’re crucial for removing waste and keeping things healthy. But just like there are different types of kidney treatments, there are various types of filter media, each with its own specialty. Understanding these differences can help you customize your filter for optimal performance.

Mechanical filtration is your first line of defense, removing visible debris like uneaten food and plant matter. Sponges and filter floss are the most common types of mechanical media. Sponges are durable and can be reused after rinsing, while filter floss is more disposable and better at trapping fine particles.

Biological filtration is where the magic happens! This type of media provides a home for beneficial bacteria that break down harmful ammonia and nitrites into less toxic nitrates. Ceramic rings and bio-balls are popular choices for biological media due to their large surface area. The more surface area, the more bacteria can colonize, and the more efficient the filtration.

Chemical filtration involves using media that absorb or remove specific chemicals from the water. Activated carbon is a common choice for removing odors, discoloration, and medications. However, activated carbon needs to be replaced regularly, as it can become saturated and release the absorbed chemicals back into the water. Understanding the role of each type of media allows you to tailor your filtration system to the specific needs of your aquarium, leading to a healthier and more vibrant aquatic environment.

Your Friendly Guide to Choosing the Best Submersible Aquarium Filters

Hey there, fellow fish enthusiast! So, you’re diving into the world of submersible aquarium filters, huh? That’s great! Keeping your underwater buddies happy and healthy starts with clean water, and a good filter is absolutely crucial. Picking the right one can feel a bit overwhelming with all the options out there, but don’t worry, I’m here to help you navigate the waters. Think of me as your friendly neighborhood aquarium guru, ready to share some wisdom gleaned from years of fish-keeping adventures. We’ll break down the key things to consider so you can find the best submersible aquarium filters for your specific needs and create a thriving aquatic environment.

Before we get started, remember that there’s no single “best” filter for everyone. It really depends on your tank size, the type of fish you have, and your personal preferences. But by understanding the factors that influence filter performance, you’ll be well-equipped to make an informed decision and choose a filter that will keep your aquarium sparkling clean and your fish thriving. So, let’s dive in!

Tank Size and Flow Rate: Matching the Filter to Your Aquarium

Alright, let’s talk about the most fundamental factor: tank size. It’s like finding the right size shoe – too big or too small, and it just won’t work. Submersible filters are designed to process a certain amount of water per hour, measured in gallons per hour (GPH) or liters per hour (LPH). A filter that’s too small won’t effectively remove waste and debris, leading to cloudy water and unhealthy conditions for your fish. Conversely, a filter that’s too powerful can create strong currents that stress out your fish, especially those who prefer calm waters.

As a general rule of thumb, you should aim for a filter that can circulate the entire volume of your tank at least four to six times per hour. So, if you have a 20-gallon tank, you’ll want a filter with a GPH rating of at least 80 to 120. Always check the manufacturer’s specifications and consider the bioload (the amount of waste your fish produce). Heavily stocked tanks or tanks with messy fish (like goldfish) may require even higher flow rates. Remember, it’s better to slightly overestimate the flow rate than underestimate it.

Filtration Stages: Understanding the Cleaning Process

Think of your filter as a tiny water treatment plant right in your living room. It’s not just about sucking up debris; it’s about creating a healthy ecosystem for your fish. The best submersible aquarium filters employ a multi-stage filtration process to remove different types of impurities. We’re talking mechanical, chemical, and biological filtration. Each stage plays a crucial role in maintaining water quality.

Mechanical filtration involves physically removing particulate matter like uneaten food, plant debris, and fish waste. This is usually accomplished with filter sponges or floss. Chemical filtration uses specialized media like activated carbon to remove dissolved pollutants, odors, and discoloration. Biological filtration is arguably the most important; it relies on beneficial bacteria to convert harmful ammonia and nitrite (produced by fish waste) into less toxic nitrate. This is often achieved with ceramic rings or bio-balls. Make sure your chosen filter includes all three stages for optimal water quality. And remember, regularly replacing or cleaning your filter media is key to maintaining its effectiveness.

Filter Media: Choosing the Right Stuff for the Job

Speaking of filter media, it’s not a one-size-fits-all kind of situation. The type of media you use can significantly impact the effectiveness of your filter. Think of different media like different tools in a toolbox; each is designed for a specific purpose. Sponges are great for mechanical filtration, trapping larger particles and preventing them from clogging other media. Activated carbon is your go-to for removing odors, medications, and other dissolved impurities.

For biological filtration, you have options like ceramic rings, bio-balls, and even lava rock. These materials provide a large surface area for beneficial bacteria to colonize and break down harmful substances. When selecting filter media, consider the specific needs of your aquarium. For example, if you’re dealing with high levels of ammonia or nitrite, you might want to invest in a specialized biological filter media. And don’t forget to replace or clean your media regularly, following the manufacturer’s instructions, to ensure optimal performance.

Ease of Maintenance: Keeping it Simple and Stress-Free

Let’s be honest, nobody wants to spend hours wrestling with their aquarium filter. So, ease of maintenance is a huge factor to consider. Look for a filter that’s easy to disassemble, clean, and reassemble. Filters with easily accessible media compartments are a big plus, as they allow you to quickly replace or clean the filter media without making a huge mess.

Also, consider the frequency of maintenance. Some filters require more frequent cleaning than others. If you’re a busy person, you’ll probably want to opt for a filter that doesn’t require constant attention. Check the manufacturer’s instructions for recommended cleaning schedules. In general, you should aim to clean your filter every few weeks or months, depending on the bioload of your tank. A little bit of regular maintenance can go a long way in keeping your filter running smoothly and your fish happy.

Noise Level: Creating a Peaceful Environment

Imagine trying to relax in your living room with a noisy filter constantly humming or buzzing in the background. Not exactly zen, right? Noise level is an often-overlooked factor, but it can significantly impact your enjoyment of your aquarium. Submersible filters are generally quieter than external filters, but some models are still louder than others.

Look for filters that are specifically designed to be quiet. Some manufacturers use noise-dampening materials or design features to minimize vibrations and reduce noise. Read online reviews to get a sense of how quiet (or not-so-quiet) a particular filter is. If you’re particularly sensitive to noise, you might want to consider placing your aquarium in a room where you don’t spend a lot of time, or investing in a soundproof aquarium stand. A little extra effort in this area can make a big difference in creating a peaceful and enjoyable aquarium experience.

Adjustability: Tailoring the Filter to Your Needs

Not all aquariums are created equal, and neither are the needs of their inhabitants. That’s why adjustability is such an important feature to look for in the best submersible aquarium filters. Think about flow rate, for instance. Some fish prefer gentle currents, while others thrive in stronger flows. A filter with adjustable flow rate allows you to customize the water movement to suit the specific needs of your fish.

Adjustable spray bars or nozzles can also be helpful, allowing you to direct the flow of water in different directions and create different types of water movement. Some filters also have adjustable air injection, which can increase oxygen levels in the water. Look for a filter that offers a range of adjustability options, so you can fine-tune its performance to create the perfect environment for your fish.

Durability and Reliability: Investing in Long-Term Performance

Finally, let’s talk about durability and reliability. You don’t want to buy a filter that’s going to break down after a few months, leaving you scrambling for a replacement. Look for filters that are made from high-quality materials and have a reputation for reliability. Read online reviews to get a sense of how well a particular filter holds up over time.

Pay attention to the warranty offered by the manufacturer. A longer warranty is usually a good indication that the manufacturer stands behind their product. Consider the reputation of the brand as well. Some brands are known for producing high-quality, durable aquarium equipment, while others are known for cutting corners. While a higher price tag doesn’t always guarantee better quality, it’s often worth investing a little more upfront to get a filter that will last for years and provide reliable performance. After all, a well-maintained filter is an investment in the health and well-being of your fish. And when it comes to our finned friends, nothing is more important than that!

FAQs

What exactly is a submersible aquarium filter, and how does it differ from other types?

Well, think of a submersible aquarium filter as an all-in-one cleaning machine that lives right inside your tank! Unlike hang-on-back or canister filters that sit outside the aquarium and use tubes to draw water in and push it back, a submersible filter is completely submerged within the water. This makes them incredibly convenient and easy to set up, often requiring just a suction cup attachment to the tank wall. They typically combine mechanical, chemical, and biological filtration in one compact unit, removing debris, pollutants, and converting harmful ammonia into less toxic substances.

The key difference lies in their placement and sometimes, their filtration capacity. While external filters like canisters often offer more robust filtration for larger tanks, submersible filters are fantastic for smaller aquariums, hospital tanks, or as supplemental filtration in larger setups. They’re generally more affordable and require less space, making them a great option for beginners or aquarists with limited space. Plus, because they’re internal, they are super easy to access for maintenance.

What size submersible filter do I need for my aquarium?

Choosing the right size filter is all about matching its filtration power to the volume of your aquarium. Most manufacturers will indicate the tank size that their filter is best suited for right on the packaging. A good rule of thumb is to look for a filter that can circulate the entire tank volume at least 4 to 5 times per hour. So, if you have a 10-gallon tank, aim for a filter with a flow rate of 40 to 50 gallons per hour (GPH).

Don’t worry too much about going slightly overboard with filtration; it’s generally better to have a filter that’s a little too powerful than one that’s not strong enough. An underpowered filter won’t effectively remove waste and keep your water clean, leading to potential problems for your fish. However, if you go too big, the current might be too strong for some fish. Look for models with adjustable flow rates so you can tailor it to your tank inhabitants.

How often should I clean my submersible aquarium filter?

Keeping your filter clean is crucial for maintaining a healthy aquarium environment. As a general guideline, you should clean your submersible filter every 2-4 weeks. However, the exact frequency will depend on several factors, including the size of your aquarium, the number of fish you have, and how heavily planted your tank is. If you notice a significant decrease in water flow from the filter, that’s a definite sign that it’s time for a cleaning.

When cleaning, avoid using soap or harsh chemicals, as these can harm the beneficial bacteria that colonize the filter media. Instead, gently rinse the filter media in a bucket of used aquarium water. This will remove debris without killing off the good bacteria. Remember, these bacteria are essential for biological filtration, which is vital for removing harmful ammonia and nitrites from your tank. Don’t replace filter media unless it’s falling apart, just rinse it!

What are the benefits of having a submersible filter versus another type of filter?

Submersible filters have a lot going for them! One of their biggest advantages is their ease of installation. You simply pop them into your tank, attach them with suction cups, and plug them in. No complicated plumbing or external setups are required, making them ideal for beginners or those who prefer a hassle-free setup. Plus, they’re incredibly convenient to maintain – just unplug, remove, and rinse!

Another benefit is their affordability. Submersible filters are typically less expensive than larger external filters like canister filters. They’re also very versatile; they can be used in small tanks, hospital tanks, or even as supplemental filtration in larger setups. Their compact size makes them ideal for tanks where space is limited. Finally, many submersible filters have adjustable flow rates, allowing you to customize the water movement in your aquarium to suit your fish.

Are submersible filters noisy? I don’t want to hear buzzing all day.

Noise levels can vary between different submersible filter models, but generally, they’re designed to be relatively quiet. Some cheaper or older models might produce a noticeable hum or buzzing sound, especially as they get older or if they’re not properly maintained. However, many newer submersible filters are engineered with noise reduction in mind, using quieter motors and better construction.

To minimize noise, make sure your filter is properly positioned and securely attached to the tank wall. Vibrations against the glass can amplify any noise. Regularly cleaning the filter and checking for any obstructions or worn-out parts can also help to keep it running quietly. Reading reviews from other users can also give you an idea of the noise level to expect from a particular model.

Can I use a submersible filter in a saltwater aquarium?

Yes, absolutely! Many submersible filters are specifically designed for use in both freshwater and saltwater aquariums. However, it’s essential to choose a filter that is made from materials that are compatible with saltwater. Saltwater is corrosive and can damage certain components, so look for filters that are explicitly labeled as being suitable for saltwater use.

When using a submersible filter in a saltwater tank, be sure to clean it regularly to prevent the buildup of salt deposits, which can affect its performance and lifespan. Also, consider the specific needs of your saltwater inhabitants. Some saltwater tanks require more powerful filtration than freshwater tanks due to the higher bioload often associated with saltwater fish and invertebrates.

What type of filter media should I use in my submersible filter?

Most submersible filters come with a combination of filter media to provide mechanical, chemical, and biological filtration. Mechanical filtration typically involves using sponges or filter floss to remove particulate matter like uneaten food and fish waste. Chemical filtration often utilizes activated carbon to remove dissolved pollutants and improve water clarity.

For biological filtration, which is crucial for converting harmful ammonia and nitrites into less toxic nitrates, you’ll want to ensure your filter has a porous material like ceramic rings or bio-balls. These provide a large surface area for beneficial bacteria to colonize. When replacing filter media, avoid replacing all of it at once, as this can disrupt the delicate balance of your biological filter. Instead, replace only a portion of the media at a time to allow the beneficial bacteria to re-establish themselves. You can also consider adding additional biological media to your filter to boost its filtration capacity.

Final Verdict

So, there you have it! We’ve explored some truly stellar contenders for the title of the best submersible aquarium filters, equipping you with the knowledge to choose the perfect fit for your aquatic paradise. Remember, selecting the right filter is a crucial step in creating a thriving and healthy environment for your finned friends. Don’t be afraid to re-read the reviews and consider your specific needs – tank size, inhabitants, and your personal preferences all play a part.

Now, it’s time to take the plunge (pun intended!). Armed with this guide, you’re well-prepared to make an informed decision and bring home a filter that will keep your aquarium sparkling clean and your fish happy for years to come. Trust your instincts, embrace the journey of aquarium keeping, and get ready to enjoy the beauty and tranquility of your underwater world. Happy filtering!

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