Best 20 Gallon Fish Tank Filter – Buying Guide

1Aqueon QuietFlow 20 LED PRO Aquarium Fish Tank Power Filter ... Top Pick

Aqueon QuietFlow 20 LED PRO Aquarium Fish Tank Power Filter …

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2Tetra Whisper IQ Power Filter 20 Gallons, 130 GPH, with ... Best Quality

Tetra Whisper IQ Power Filter 20 Gallons, 130 GPH, with …

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3AQUA-TECH Ultra Quiet Power Filter, for Aquariums 20-40 Gallons Recommended

AQUA-TECH Ultra Quiet Power Filter, for Aquariums 20-40 Gallons

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4AQUANEAT Aquarium Corner Sponge Filter, Air Driven, for Fish Tank ...

AQUANEAT Aquarium Corner Sponge Filter, Air Driven, for Fish Tank …

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5Tetra Whisper EX 30 Filter For 20 To 30 Gallon ...

Tetra Whisper EX 30 Filter For 20 To 30 Gallon …

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6Aqueon QuietFlow E Internal Power Filter Medium - 20 Gallon

Aqueon QuietFlow E Internal Power Filter Medium – 20 Gallon

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7Aqueon QuietFlow 10 LED PRO Aquarium Fish Tank Power Filter ...

Aqueon QuietFlow 10 LED PRO Aquarium Fish Tank Power Filter …

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8TARARIUM Aquarium Filter for 20-40 Gal. Tank Crystal 150GPH Multi ...

TARARIUM Aquarium Filter for 20-40 Gal. Tank Crystal 150GPH Multi …

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9TARARIUM Aquarium Power Filter 158GPH w/Surface Skimmer Adjustable Multi-Stage Hang ...

TARARIUM Aquarium Power Filter 158GPH w/Surface Skimmer Adjustable Multi-Stage Hang …

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10Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter (UGF) – Freshwater ...

Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter (UGF) – Freshwater …

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Review of Best 20 Gallon Fish Tank Filter

Top Pick

Aqueon QuietFlow 20 LED PRO Aquarium Fish Tank Power Filter ...

1. Aqueon QuietFlow 20 LED PRO Aquarium Fish Tank Power Filter …

  • Brand: Aqueon
  • Manufacturer: Central Garden & Pet
  • Dimensions: Height: 4.4 Inches Width: 7.9 Inches Length: 7.4 Inches Weight: 1.7 Pounds `

Features

  • Dense floss removes particles and debris
  • Activated carbon removes toxins, odors and discoloration
  • Patented bio-holster removes toxic ammonia and nitrites
  • Diffuser grid removes additional toxins while adding oxygen for more active fish
  • Reduces splashing making the return exceptionally quiet

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Best Quality

Tetra Whisper IQ Power Filter 20 Gallons, 130 GPH, with ...

2. Tetra Whisper IQ Power Filter 20 Gallons, 130 GPH, with …

  • Brand: Tetra
  • Manufacturer: Tetra
  • Dimensions: Height: 7.75 Inches Width: 6.0 Inches Length: 6.88 Inches Weight: 2.0 Pounds `

Features

  • QUIET AQUARIUM FILTER: The Tetra Whisper IQ Power Filter with Stay Clean technology contains a sound shield for quiet filtration less than 40 dB.
  • SELF PRIMING: Submerged motor starts up with no priming required.
  • CAPACITY: The Tetra Whisper IQ 20 Power Filter works in filters up to 20 gallons (130 GPH).
  • STAY CLEAN TECHNOLOGY: By maintaining healthy pH levels, creates easier maintenance for healthier fish.
  • CARTRIDGE REFILLS: Change cartridges monthly; uses large-sized Tetra Whisper Bio-Bag Filter Cartridges (refills sold separately).

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Recommended

AQUA-TECH Ultra Quiet Power Filter, for Aquariums 20-40 Gallons

3. AQUA-TECH Ultra Quiet Power Filter, for Aquariums 20-40 Gallons

  • Brand: AQUA-TECH
  • Manufacturer: Spectrum Brands Pet

Features

  • INCLUDES CARTRIDGE: The molded ribbed back maximizes contact with water – includes premium activated carbon.
  • BIOLOGICAL FILTRATION: Bio-Foam biological filtration removes toxic ammonia and nitrites on contact.
  • QUIET: Decoupled motor with dampeners reduces noise to below 40 dB.
  • POWERFUL: Impeller and motor assembly designed for efficient power usage filters 20-to 40-gallon aquariums 5 times per hour.
  • SLEEK DESIGN: Designed to fit standard aquarium hoods and canopies, the Aqua-Tech Ultra Quiet Power Filter makes aquatic filtration easy.
  • Age range description: All Life Stages

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AQUANEAT Aquarium Corner Sponge Filter, Air Driven, for Fish Tank ...

4. AQUANEAT Aquarium Corner Sponge Filter, Air Driven, for Fish Tank …

  • Brand: AQUANEAT
  • Manufacturer: AQUANEAT

Features

  • Corner filter provide both mechanical and bio filtration, and supplying the water with much needed oxygen; Reduces noise from air pump and consumes lowest wattage
  • Easy to set up & clean: simply install an airline into the unit and just turn on the air pump; Open the box and simply rinse and squeeze in tank water
  • Safe for fish:excellent for small size fish like dwarf cichlid, guppy, killifish etc., or for hatcheries, maternity tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter
  • Dimension:4″L x 3.125″W x 3.25″ to 6″H; Recommend tank size: up to 20 gallon
  • Includes: one box filter included media as shown in picture

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Tetra Whisper EX 30 Filter For 20 To 30 Gallon ...

5. Tetra Whisper EX 30 Filter For 20 To 30 Gallon …

  • Brand: Tetra
  • Manufacturer: Tetra
  • Color: Blacks & Grays
  • Dimensions: Height: 9.69 Inches Width: 7.25 Inches Length: 6.19 Inches Weight: 1.0 Pounds `

Features

  • WHISPER QUIET The Tetra Whisper EX Power Filter provides silent multi-stage filtration for clear clean water
  • FAST SETUP Sets up easily right out of the box – no priming required
  • CONTINUOUS FLOW Moves water continuously to prevent debris buildup
  • NO-MESS FILTER CARTRIDGE CHANGES Design minimizes dripping to make cartridge changes easy
  • SIZE This filter fits 20 to 30 gallon aquariums
  • Age Range Description: All Ranges

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Aqueon QuietFlow E Internal Power Filter Medium - 20 Gallon

6. Aqueon QuietFlow E Internal Power Filter Medium – 20 Gallon

  • Brand: Aqueon
  • Manufacturer: Central Garden & Pet
  • Dimensions: Height: 7.5 Inches Width: 5.25 Inches Length: 2.25 Inches Weight: 1.25 Pounds `

Features

  • Efficiently cleans and filters water
  • Easy to install using suction cups and/or hanging clips
  • Auto-start pump requires no priming, automatically restarts if power is interrupted and restored
  • On average, change filter cartridge every 4 weeks
  • Carbon Cartridge included for chemical filtration; removes odors and discoloration from water
  • Bioholster included to foster biological filtration which removes toxic ammonia and nitrites
  • Coarse Media Sponge included for mechanical filtration; removes particles and debris
  • Uses Medium Aqueon Replacement Cartridges
  • Fits aquarium size up to 20 gallons

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Aqueon QuietFlow 10 LED PRO Aquarium Fish Tank Power Filter ...

7. Aqueon QuietFlow 10 LED PRO Aquarium Fish Tank Power Filter …

  • Brand: Aqueon
  • Manufacturer: Central Garden & Pet
  • Dimensions: Height: 3.8 Inches Width: 6.3 Inches Length: 6.4 Inches Weight: 1.2 Pounds `

Features

  • LED indicator light flashes when water cannot pass through the cartridge, generally indicating it’s time to change the cartridge
  • Self-priming filter pump will auto-start initially or restart if power is interrupted and restored
  • Provides mechanical, chemical, biological and optional, additional specialty pad filtration
  • High flow rates for optimal dissolved oxygen content to promote healthier, more active fish
  • Internal pump design helps dampen noise and eliminate leaks with self-priming feature
  • Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria
  • Fits fresh or saltwater aquarium size up to 20 gallons
  • Uses One Medium Aqueon Replacement Cartridge and Size 10 Specialty Filter Pads

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TARARIUM Aquarium Filter for 20-40 Gal. Tank Crystal 150GPH Multi ...

8. TARARIUM Aquarium Filter for 20-40 Gal. Tank Crystal 150GPH Multi …

  • Brand: TARARIUM
  • Manufacturer: TARARIUM
  • Color: A-HBL802 Aquarium Filter

Features

  • 💎【Crystal Clear-Multi Filtration】 Makes a cloudy aquarium clean and crystal clear and reduces some odor. This aquarium filter does a great job in keeping the water clean and crystal clear. This fish tank water filter reduces the number of water changes in large aquariums and creates a filtration circulation system.
  • 🌙【Quiet Working】 This aquarium filter works very quietly, the noise of the engine is below 40 decibels when working, and you can only hear the sound of water flow. When the filter starts, there will be a little noise, please wait patiently for 5 minutes, then it will be very quiet.
  • 🐟【Happy Fish】 Two types of water outlet can be changed according to the preference of fish. Waterfall and rain shower water outlet can make the small fish swim happily in the tank.The water flow adjustable. Small fish will not be sucked into the filter canister, for the safety of small fish.
  • 🐳【150 GPH】 It is suitable for 20-40 gallon aquarium. Of course, you can use this hang on back aquarium filter for bigger aquarium, but the effect may not be very good. If you want better filtration effect, you can use 2 filters in a bigger tank. Package Include: 1*filter whole and accessories , 4*white filter cotton in canister. In addition there are 6 sachets of activated carbon in the filter box and 4* black filter sponges replacement.
  • 💞【1 Year Warranty】 We offer you 12 months warranty and friendly customer service. After you receive the fish tank canister filter (filtro para pecera), if you are not satisfied with our filtered fish tank, please contact the email on the user manual. We will provide a satisfactory solution for you.

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TARARIUM Aquarium Power Filter 158GPH w/Surface Skimmer Adjustable Multi-Stage Hang ...

9. TARARIUM Aquarium Power Filter 158GPH w/Surface Skimmer Adjustable Multi-Stage Hang …

  • Brand: TARARIUM
  • Manufacturer: TARARIUM
  • Color: A-HBL701-Filter

Features

  • 🤗【Reducing Water Changes】 Make the turbid cloudy fish tank clean and crystal clear. This HOB aquarium filter does a great job in reducing water changes.
  • ✨【Surface Skimmer & 4-Layer Filtration 】 It can automatically adjust the height and rotate to clean the surface scum according to the water level. The filter sponge & activated carbon filter plate helps to continuously remove odor and excrement.
  • 👍【Adjustable Flow & Easy to Assemble】 Just rotate the adjustment switch to easily select the appropriate water flow. It is a VIDEO on the listing or feel free to contact us. We will patiently explain to you step by step in 24 hours.
  • ♻️【Energy Saving & Quiet】 Due to the scientific structure, the pump is very powerful and energy-saving. The engine sound of this machine is less than 40 decibels. (Noise may occur for about 1 minute during the pumping process).
  • 💌【1-year Warranty】 For any questions or problems, please feel free to contact us. We will reply within 24 hrs. Our products are backed by an after-sales policy. ​If there are any problems, please DO NOT RETURN, contact us first, we will give you a satisfactory solution! Your satisfaction is our goal, which in turn gives us the motivation and inspiration to carry out our work.

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Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter (UGF) – Freshwater ...

10. Penn-Plax Clear-Free Premium Under Gravel Aquarium Filter (UGF) – Freshwater …

  • Brand: Penn-Plax
  • Manufacturer: Penn Plax, INC.
  • Color: Blue
  • Dimensions: Height: 16.25 Inches Width: 11.2 Inches Length: 22.5 Inches Weight: 1.0 Pounds `

Features

  • NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 15 – 20 (high) gallon aquariums.
  • BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
  • ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system! It’s a filter and bubbler in 1!
  • ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
  • MEASUREMENTS: Each Filter Plate Separately = 11.25” (W) x 11.2” (D) / Filter Plates Together = 22.5” (W) x 11.2” (D) / Each Lift Tube at Filter Plate Base = 12” – 15”

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