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The 8 Best aquarium canister filters of 2025

Are you trying to find aquarium canister filters among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling aquarium canister filters on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 13 hours of research and did 36 aquarium canister filters tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best aquarium canister filters you can buy today

No. 1
Penn-Plax Cascade All-in-One Aquarium Canister Filter – for Tanks Up to 100 Gallons (265 GPH) – Cascade 1000
  • CASCADE 1000 CANISTER FILTER: Without effort, the Cascade 1000 Canister Filter quietly delivers crystal clear water throughout the tank. Recommended for aquariums up to 100 gallons, this filter cycles water at 265 Gallons per Hour. It’s compatible for both freshwater and saltwater fish tanks, and is also great for water based turtle habitats.
  • STATE OF THE ART FEATURES: In addition to the push button primer that allows for a simple and quick prime, this Canister Filter also features two independent valve taps that rotate 360°. This makes for easy maneuvering, even in the tightest aquarium cabinets. The 3 stackable, large capacity media baskets give aquarists the ability to customize filtration.
  • FILTER MEDIA: This Canister Filter comes standard with 1 Coarse Bio-Sponge, 3 Poly Fiber Floss Pads, and 1 Bag of Activated Carbon. In addition to optimizing the colonization of anaerobic bacteria, this filter traps floating particulate matter, removes harmful chemicals and toxins, clears up discolorations, and reduces foul odors from your aquarium’s water.
  • ITEMS INCLUDED: 2 Independent Valve Taps, Push Button Primer, Flow Rate Control Cut-Off Valves, Swimming-Pool Style Hose Clamps, 4 Easy Lift Alignment Clamps, Sturdy Tip-Proof Base, 3 Large Capacity Media Baskets, 3 Poly Fiber Floss Pads, 1 Coarse Bio-Sponge, and 1 Bag of Activated Carbon.
  • MEASUREMENTS AND OTHER USEFUL INFO: The Cascade 1000 Canister Filter measures 11.5” (W) x 10” (D) x 17” (H). Additional Info = 110 Volts / 60 Hz / 28.5 W.
No. 2
AMOSIJOY 172GPH Canister Filter, Ultra-Quiet External Aquarium Filter with Free Media for Large Fish Tanks and Aquariums (172GPH)
1,949 Consomer Reviews
AMOSIJOY 172GPH Canister Filter, Ultra-Quiet External Aquarium Filter with Free Media for Large Fish Tanks and Aquariums (172GPH)
  • One More Replacement Bulb & Complimentary Filter Medias: There are 2 bulbs come with this filter, which can effectively turn green water tank into crystal clear, improving the water quality. One more bulb is equipped with this filter that longer service life is ensured and the bulb can be timely replaced once the assembled one broken. Complimentary filter sponges and bio balls also speed up purifying the water.
  • One Step To Make The Filter Running: Updated Design - Siphon Water Filling Nozzle, only one step that filling the water inlet system with water by adding water from the the water filling nozzle, water will automatically run into the filter after plugging the filter in and opening the water flow valve without any strenuous operation.
  • Adjustable Water Flow: Adjustable water flow valve is designed to adapt to various usage scenarios. By rotating the flow regulating handle, water flow can be adjusted from maximum to minimum, even to zero. It is applicable to both fish tank and turtle tank, which varies in water demand.
  • 172GPH Canister Filter:AMOSIJOY external aquarium filter runs at 172GPH(650L/H), wattage is 8w. It is suitable for freshwater fish tanks, turtle tank and aquariums up to 30 gallons. Low wattage and high flow without air inside the filter, generates no noise. The sound is ≤ 30db.
  • 180 Days Warranty: We provide 180 days customer service. If any issue occurs to the filter, please contact us to solve the issue.
No. 3
SunSun Hw302 265GPH Pro Canister Filter Kit, white - 9 Piece Set
  • HW-302 Pro Filtration Kit, Good for up to 75 gallon aquariums
  • Flow rate: 265 GPH (1000L/Hr)
  • Dimension: 9" L X 9" W X 15.5" H
  • Pro Kit Includes Canister Filter, 3 White Filter Pads and 3 Media Baskets
  • Includes 1lb of Premium Filter Carbon, 1lb of Ceramic Rings and 1 Set of Bio Balls
No. 4
Fluval 207 Perfomance Canister Filter - for Aquariums Up to 45 Gallons - Aquarium Canister Filter
  • Efficient Aquarium Canister Filter: Fluval eTEC technology delivers powerful pump performance and ultra-quiet operation; uses same energy as LED light bulb
  • Reliable Aquarium Filter: Powerful motor generates constant pumping power and pressure; ensures healthy and clean fish tank for your pet fish
  • Silent Fish Tank Filter: Precision-crafted pump runs up to 25% quieter than previously; perfect choice for pet owners looking for a peaceful fish tank enclosure
  • Convenient Fluval Filter: The EZ-Lift media baskets with new center handle allow media stack to be removed with just one finger; provides quick access
  • Innovation for Fish Keepers: Fluval innovates to foster a sustainable future where aquatic life and humankind can thrive in harmony
No. 5
Marineland Magniflow Canister Filter 220 GPH For aquariums, Easy Maintenance
  • 3-STAGE FILTRATION: Water flows through media layers to filter water and ensure a clean aquatic environment.
  • FAST SETUP: Water-tight canister lid lifts up for easy removal.
  • EASY MAINTENANCE: Valve block for quick release to shut down water flow – separates from housing for quick, spill-free maintenance.
  • THREE SIZES AVAILABLE: Comes in 220 GPH, 360 GPH and 360 GPH sizes.
  • MARINELAND FILTRATION PRODUCTS: Count on Marineland brand for the most reliable, technically advanced aquariums and accessories on the market.
No. 6
Aquatop CF-400UV MKII Canister Filter Vortex Prime – 3+1 Stage Filtrationm - 9 Watts - 370 GPH Flow Rate - Up to 125-Gallon Aquariums – Media Included
  • Canister Filter for Aquariums Up to 125 Gallons: The Aquatop CF-400UV MKII is designed for both freshwater and saltwater tanks, providing efficient 3+1 stage filtration for tanks up to 125 gallons.
  • 9W for Crystal Clear Water: Featuring a built-in 9W, this filter eliminates particles, ensuring your aquarium water remains crystal clear and healthy.
  • 370 GPH Flow Rate for Optimal Circulation: With a flow rate of 370 gallons per hour, this canister filter ensures proper water circulation and oxygenation, essential for your aquatic ecosystem.
  • Easy Installation & Maintenance: The CF-400UV MKII is designed for quick installation and easy maintenance, with convenient access to the filter media for cleaning and upkeep.
  • Durable and Reliable: This canister filter is built with high-quality materials to provide long-lasting performance and dependable filtration for both freshwater and saltwater environments.
No. 7
Fluval FX6 High Performance Aquarium Filter, Canister Filter for Aquariums up to 400 Gal.
  • Multi-stage filter pumps out 925 US Gal (3,500 L) of water per hour, Smart Pump advanced microchip technology continuously monitors and optimizes pump performance
  • Self-starting – just add water, plug in and Smart Pump will take over, trapped air auto-evacuated every 12 hours to ensure maximum efficiency
  • Easy water changes eliminate need to lift heavy buckets. Simply attach hosing to output and Smart Pump does the rest
  • Removable, stackable media baskets eliminate water bypass and hold a total of 1.5 US Gal (5.9 L) of media, all filter media included - mechanical, chemical and biological
  • Compact 21 in (53 cm) tall design - easily fits under most aquariums
No. 8
Polar Aurora Free Media 265GPH / 370GPH / 525GPH External Aquarium Filter with Builtin Pump Kit Canister (265GPH)
3,405 Consomer Reviews
Polar Aurora Free Media 265GPH / 370GPH / 525GPH External Aquarium Filter with Builtin Pump Kit Canister (265GPH)
  • Good for up to 75 gallon fish tanks SunSun parts can be applied Flow rate: 264 GPH (1000L/hr) Pump Power: 18W Hose size: 3/4" Max-H: 4.6 feet
  • 3 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter. No Light!!!
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Canister filters for aquariums use high water pressure, from a properly powered pump, to force water through the dense filter media. A pump can draw water from an under-gravel filter, and run it into a canister for double filtration
  • The three flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration.
SaleNo. 9
Sunsun HW-3000 UV 9W 5-Stage External Canister Filter w/Media, 793gph, White, HW-3000 PRO
  • 5-Stage Canister w/ 9W UV Sterilizer
  • Amazing LCD display that is simple and easy to use
  • Adjustable Flow: 396-793gph, perfect for your tank!
  • No priming required
  • Suitable for freshwater and saltwater aquariums
No. 10
Aqueon QuietFlow Aquarium Fish Tank Canister Filter For 55-100 Gallon Aquariums
  • Multi-stage filtration that includes biological, chemical and mechanical
  • Easy access for quick routine maintenance with included hang on the back polishing unit
  • Multiple water return options for optimal versatility to best suite a variety of aquarium habitats; spray bar, water director and water polishing unit
  • Water Polishing Unit uses Large Aqueon Replacement Filter Cartridges; replace monthly
  • Internal media replacement; carbon change every 30 days, foam pad rinse or replace as needed, white polishing pad change as needed
  • Includes quick disconnect valves, pump locking heads, water intake/output connections, hoses, water polishing unit with cartridge and media: activated carbon, coarse foam, bio-balls, bio-ceramic rings
  • Fits aquarium size up to 75 gallons
No. 11
Polar Aurora 4-Stage External Canister Filter 525GPH with 9-watt Light NEW(525GPH)
  • Good for up to 200 gallon fish tanks.Maximum flow rate of 525GPH from built in pump
  • 4 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Built in 9 Watt Light for controlling algae spores/bacteria and promoting clear water
  • The four flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration.
No. 12
SunSun HW-302 3-Stage External Canister Aquarium Filter 264GPH
850 Consomer Reviews
SunSun HW-302 3-Stage External Canister Aquarium Filter 264GPH
  • Canister filters for aquariums use high water pressure, from a properly powered pump, to force water through the dense filter media. A pump can draw water from an under-gravel filter, and run it into a canister for double filtration
  • 3 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Provides quiet, efficient filtration for fresh and saltwater aquariums is great for living rooms, offices or bedrooms
No. 13
VEVOR Aquarium Filter 172GPH, Canister Filter 30 Gallon, Ultra-Quiet Internal Aquarium Filter with UV Protection, Submersible Power Filter with Multiple Function for Fish Tanks, 8W
  • Efficient Filtration: The built-in pump has a maximum flow rate of 172GPH( 650 L/H) with a power of 8W, recommended for use in 30-gallon freshwater aquariums, turtle tanks, and fish tanks. The water flows through the media layers to filter water and ensure a clean aquatic condition. Each layer has a sponge to hold it in place, and it comes with ceramic rings and bio-balls.
  • Silent Operation: Equipped with an internal pure copper brushless motor, the filter operates extremely quietly. There is no air inside the filter, ensuring low power consumption and high flow rate without any noise. The sound level is less than 50 decibels, so your home life won't be disturbed, while still achieving effective water purification.
  • User-Friendly: This aquarium filter is user-friendly and easy to use: UV lamp with timer (4/8/24H auto switch), flow control valve, and dual quick-release head design for effortless cleaning and maintenance.
  • High Sealing: The quick-release joint design enhances the sealing of the ports, greatly improving the convenience of disassembly and cleaning, and optimizing the leak-proof design. The thickened and tightened silicone ring design reinforces leak prevention. The rotor structure has been optimized to extend its lifespan, with both ends of the rotor becoming an integrated unit.
  • Versatile Application: This aquarium filter is primarily designed to remove remain and waste from fish and turtles in aquariums, keeping the water clear, oxygenated. It is suitable for fish growth and can be used in various settings, including home aquariums, aquarium exhibition tanks, and flower and bird market tanks. It is one of the most essential purchases for aquarium enthusiasts.
No. 14
SunSun HW703B 370GPH Pro Canister Fish Tank Filter Kit with 9-watt UV Sterilizer
  • 4-stage aquarium canister filters at a great hobby-friendly value, 370GPH
  • Integrated 9W UV sterilization to eradicate unwanted algae and harmful disease causing pathogens
  • Provides quiet, efficient filtration for fresh and saltwater aquariums
  • 3 Large Media Baskets for All Your Media Need, PRO Media kits included
  • Dimension: 11" L X 11" W X 16" H, US plug 110-120v
SaleNo. 15
Fluval FX2 High Performance Canister Aquarium Filter - Multi-Stage Filtration, Built-in Powered Water Change System, and Basket-in-Basket Tray Design
55 Consomer Reviews
Fluval FX2 High Performance Canister Aquarium Filter - Multi-Stage Filtration, Built-in Powered Water Change System, and Basket-in-Basket Tray Design
  • Enhanced Performance: Multi-stage filter pumps out 475 US Gal (1,800 L) of water per hour, with the patented Smart Pump advanced microchip technology continuously monitoring and optimizing pump performance.
  • Self-Starting: Just add water, plug in and Smart Pump technology will take over. Any trapped air is auto-evacuated every 12 hours to ensure maximum efficiency.
  • Multi-functional Utility Valve: Drain at the base makes it possible to empty the canister and perform seamless water changes by draining and refilling water directly from it. Convenient lid-mounted hosing clips offer clean storage when not in use.
  • 4-Stage Filtration: Four removable filter baskets eliminate water bypass and hold up to 1 US Gal (3.9 L) of media: mechanical, chemical, and biological. These baskets enable you to stack in the precise combination that will work best for your aquarium.
  • Compact and Quiet Design: FX2 canister filter is 16.5" (42 cm) tall, is 15% smaller than the FX4, and fits under most aquariums. Unidirectional impeller has fewer mechanical joints for reduced noise. Rubber feet reduce vibration and add stability.
No. 16
hygger Quiet Self-Priming Canister Filter with U-V Light Foam Ceramic Rings
  • QUICK, SIMPLE AUTO-START CANISTER FILTER- hygger Self-Priming Canister Filter requires No siphoning, pumping or priming, just one touch set button, making startup hassle-free and convenient, automatically restarts if power is interrupted and restored
  • EFFICIENT QUIET 2-STAGE FILTRATION- 2 stacking, large capacity media trays includes foam pad and ceramic rings which completes mechanicaland biological filtration can efficiently and quietly clean and clear water. It also allows you to customize filtration media for your tanks' specific needs, giving you complete control over the filtraion process
  • U-V LIGHT FOR CRYSTAL CLEAR WATER- Build in 7 watt U-V bulb with protective case, aquarium U-V filter effectively takes care of agae bloom, eliminating cloudiness, thus reduce water change, keeping the water crystal clear and ensuring a healthy and clean environment for your aquatic pets.
  • EASY TO ASSEMBLE AND CLEAN- Quick inlet and outlet connect valve makes it simple to adjust and stop water flow, attach and disconnect the hoses from the canister without pulling it out of the cabinet when it has to undergo cleaning and maintenance. Easy accessible filter media baskets with handle it is convenient to pull out clean or replace filter medias
  • FOR FRESHWATER & SALTWATER TANKS- Fish tank canister filter meaures 7.1×7.1×11.2 inches, Power: 18W, cycles water at 211 Gallons per Hour and is recommended for 10-30 gallons freshwater, saltwater aquariums and planted tanks. Not suitable for low water level turtle tanks.
No. 17
VEVOR Aquarium Filter 396GPH, 5-Stage Canister Filter 125-200 Gallon, Ultra-Quiet Internal Aquarium Filter with UV Protection, Submersible Power Filter with Multiple Function for Fish Tanks, 20W
  • Efficient Filtration: The built-in pump has a maximum flow rate of 396GPH(1500 L/H) with a power of 20W, recommended for use in 125-200 gallon freshwater aquariums, turtle tanks, and fish tanks. The water flows through the media layers to filter water and ensure a clean aquatic condition. Each layer has a sponge to hold it in place, and it comes with ceramic rings and bio-balls.
  • Silent Operation: Equipped with an internal pure copper brushless motor, the filter operates extremely quietly. There is no air inside the filter, ensuring low power consumption and high flow rate without any noise. The sound level is less than 50 decibels, so your home life won't be disturbed, while still achieving effective water purification.
  • User-Friendly: The UV lamp has a timer upgrade, allowing for automatic on/off settings at 4/8/24-hour intervals. It also features a flow adjustment valve to regulate water flow from maximum to minimum, and even shut it off completely if desired. The dual quick-release head design makes cleaning and maintenance a breeze, and the inlet has an oil film removal feature to ensure ample oxygen in the fish tank.
  • High Sealing: The quick-release joint design enhances the sealing of the ports, greatly improving the convenience of disassembly and cleaning, and optimizing the leak-proof design. The thickened and tightened silicone ring design reinforces leak prevention. The rotor structure has been optimized to extend its lifespan, with both ends of the rotor becoming an integrated unit.
  • Versatile Application: This aquarium filter is primarily designed to remove remain and waste from fish and turtles in aquariums, keeping the water clear, oxygenated. It is suitable for fish growth and can be used in various settings, including home aquariums, aquarium exhibition tanks, and flower and bird market tanks. It is one of the most essential purchases for aquarium enthusiasts.
  • Friendly Note: Tested flow rates are under no-load conditions and will decrease with filter use and height differences.
No. 18
Aquarium Filter Canister Filter with UVC Light Fish Tank Filters with 2 Media Sponge Up to 75 Gallon Ultra Quiet External Turtle Tank Filter with UV Sterilizer for Crystal Clear Water (265GPH-UV)
  • 【UVC Light*2】2024 new upgraded model. Improved injection molding process and solved water leakage problem. Equipped with 1 UVC bulb in this filter bucket, and we also have prepared a replacement UVC bulb. It can effectively remove green algae, and effectively keep the water clear. The presence of UV lamps can enhance the filtering effect on the basis of ordinary filtration. Two bulbs will provide extended usage time.
  • 【Adjustable Water Volume】In order to adapt to the use of various cylinders, a valve that can adjust the amount of water is specially designed. This way we can determine the amount of water according to the size of the tank and the type of pets in it. This can be used in a fish tank or in a turtle tank.
  • 【Up to 75 Gallon】The external filter barrel itself has a power of 10W and a flow rate of 1000L/H, which is equivalent to 265GPH. The lift is 1.2 meters, of course, if it is used in a fish tank, it can be connected to a tube. The power cord is 1.65 meters long and can meet the daily use. The whole fit tank can reach 75 gallons.
  • 【4 Media Sponges & Complimentary Bio Balls】We have placed 4 pieces of biological filter sponges and complimentary bio balls in the bucket, which can effectively filter impurities, make the water flow smoother, and make the water quality more suitable for pets.
  • 【180 Days Warranty】We are committed to providing our customers with quality products and services, so if you have any questions, please come to contact us and we will do our best to solve the problem. EPA EST NO.: 96998-CHN-1
No. 19
hygger Aquarium Filter
21 Consomer Reviews
hygger Aquarium Filter
  • 【Filtration Principle
SaleNo. 20
Finnex PX-150 Compact Aquarium Canister Aquarium Filter, up to 30 Gallons, 3 Stage Media Plus Flow Valve
  • Aquarium Canister Filter
  • Finnex PX-150 3 Stage Filtration: Carbon, Floss, Ceramic Rings
  • Good for 5, 10, 15, 20, 25, and 30 gallon aquariums with flow control

How to choose a good aquarium canister filters

Does the idea of finding a fantastic aquarium canister filters make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in aquarium canister filters. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top aquarium canister filters products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top aquarium canister filters on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top aquarium canister filters brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top aquarium canister filters based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the aquarium canister filters were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good aquarium canister filters, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your aquarium canister filters.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting aquarium canister filters for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our aquarium canister filters. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what aquarium canister filters should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on aquarium canister filters.