Do all fish tanks and aquariums need filters?

All fish tanks and aquariums do need filters to clean the water and prevent the buildup of toxic substances. Different aquariums may need different types of aquarium water filters, depending on the fish inside them and whether they are saltwater or freshwater tanks. Chewy carries a wide range of fish tank filters to suit a variety of filtration needs.

What are the best aquarium filters?

The best aquarium filters are those that effectively clean the water by removing chemical impurities and biological toxins in addition to filtering dirt and debris. Choose a filter that is suited to the type of tank you have, as saltwater tanks have different filtration needs than freshwater tanks. Sponge or air-powered fish tank water filters may be adequate for tanks with low filtration needs, but power or hang-on-back filters, canister filters and wet/dry filters can provide more powerful filtration.

What size fish tank filter do I get?

Get a fish tank filter in a size that is suitable for your fish tank. Most fish tank filters list the tank capacity they are suited for, and they also usually list how many gallons of water per minute they can filter.

What are the different types of filters for fish tanks?

The different types of filters for fish tanks are sponge filters, hang on back (HOB) filters, canister filters, trickle or wet/dry filters, box filters and under gravel filters. Filters perform any of three main types of aquarium filtration: biological, mechanical and chemical. Many filters are designed to perform several or all three filtration functions at once, providing your fish with clean and clear water that is free from debris, chemical buildup and harmful toxins.

How often do you need to change aquarium filters?

You need to change aquarium filters at different times depending on which kind you have. Mechanical filters don't need to be replaced until they stop filtering or start falling apart, and replacing them too often can disrupt the balance of the aquarium. The chemical filter should be changed every month, or every two months at the very least. Biological filters allow beneficial bacteria to grow, so replace them only when they start to fail or fall apart. Most aquarium filters, including multi-stage fish tank filters, will usually have instructions for use, maintenance and care, so read all the instructions carefully and follow them well.

Aquarium & Fish Tank Filters - Page 2 (Free Shipping)

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Aqueon Quietflow E Internal Power Filter, 10-gal slide 2 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 3 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 4 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 5 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 6 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 7 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 8 of 9

Aqueon Quietflow E Internal Power Filter, 10-gal slide 9 of 9

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Aqueon Quietflow E Internal Power Filter, 10-gal

Rated 3 out of 5 stars

$15.77 Chewy Price

$18.49 List Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Slide 1 of 4

Fluval Aquarium Underwater Filter, 12-30 gal slide 2 of 4

Fluval Aquarium Underwater Filter, 12-30 gal slide 3 of 4

Fluval Aquarium Underwater Filter, 12-30 gal slide 4 of 4

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Fluval Aquarium Underwater Filter, 12-30 gal

Rated 3.7 out of 5 stars

$61.01 Chewy Price

$76.99 List Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

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Fluval Aquarium Power Filter, 70-gal slide 2 of 9

Fluval Aquarium Power Filter, 70-gal slide 3 of 9

Fluval Aquarium Power Filter, 70-gal slide 4 of 9

Fluval Aquarium Power Filter, 70-gal slide 5 of 9

Fluval Aquarium Power Filter, 70-gal slide 6 of 9

Fluval Aquarium Power Filter, 70-gal slide 7 of 9

Fluval Aquarium Power Filter, 70-gal slide 8 of 9

Fluval Aquarium Power Filter, 70-gal slide 9 of 9

Fluval Aquarium Power Filter, 70-gal

Rated 3.3 out of 5 stars

$62.60 Chewy Price

$79.99 List Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

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Penn-Plax Cascade 170 Internal Aquarium Filter slide 2 of 4

Penn-Plax Cascade 170 Internal Aquarium Filter slide 3 of 4

Penn-Plax Cascade 170 Internal Aquarium Filter slide 4 of 4

Penn-Plax Cascade 170 Internal Aquarium Filter

$12.30 Chewy Price

$18.99 List Price

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Free 1-3 day delivery on first-time orders over $35
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Marineland Multi-Stage C-530 Aquarium Canister Filter, 150-gal

Rated 4 out of 5 stars

$225.99 Chewy Price

$397.79 List Price

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Free 1-3 day delivery on first-time orders
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SunSun HW-302 Aquarium Canister Filter, 75-gal

Rated 4.7 out of 5 stars

$59.48 Chewy Price

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Aqueon QuietFlow 20/75 Carbon Reducing Specialty Aquarium Filter Pads, 2 count

Rated 3 out of 5 stars

$9.30 Chewy Price

$13.40 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Underwater Treasures Seapora Rite-Fit PF10/30 Medium/Junior Cartridge Power Aquarium Filter, 3 ...

$5.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aquatic Life RO Buddie Four Stage Osmosis System, 50-gal

Rated 3.3 out of 5 stars

$81.95 Chewy Price

$97.49 List Price

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Free 1-3 day delivery on first-time orders
Free 365-day returns

Lee's Aquarium & Pets Round Under Gravel Aquarium Bowl Filter, Large

$67.44 Chewy Price

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Free 1-3 day delivery on first-time orders
Free 365-day returns

SunSun HW-603B Aquarium Canister Filter, 20-gal

Rated 4 out of 5 stars

$38.16 Chewy Price

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Free 365-day returns

Tetra Whisper Aquarium Internal Filter, Black, 4-gal

$14.32 Chewy Price

$17.49 List Price

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Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Fluval Underwater Filter Poly/Carbon Cartridge, 2 count

Rated 3 out of 5 stars

$7.39 Chewy Price

$11.99 List Price

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Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

OASE Indoor Aquatics Biostyle 50 Fish Filter, Dark Blue

$69.99 Chewy Price

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Free 1-3 day delivery on first-time orders
Free 365-day returns

Penn-Plax Cascade Aquarium Bio-Sponge 1200 & 1500 Filter, Medium

Rated 4 out of 5 stars

$9.12 Chewy Price

$9.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aquatic Life RO Buddie Three Stage Osmosis System, 50-gal

Rated 2.7 out of 5 stars

$64.81 Chewy Price

$79.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Aqueon QuietFlow 10 Series Aquarium Filter Kit

$36.66 Chewy Price

$44.99 List Price

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Free 1-3 day delivery on first-time orders
Free 365-day returns

Penn-Plax Fishbowl Filter Kit

$18.58 Chewy Price

$29.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Eheim Classic 250 External Aquarium Canister Filter

Rated 4 out of 5 stars

$141.75 Chewy Price

$149.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Aqueon QuietFlow 30/50 Carbon Reducing Specialty Aquarium Filter Pads

Rated 4 out of 5 stars

$7.47 Chewy Price

$10.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Penn-Plax Cascade 100 Power Hang-On Filter

$40.99 Chewy Price

$50.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Marineland Penguin 75 Power Filter

Rated 3.3 out of 5 stars

$22.12 Chewy Price

$23.19 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon QuietFlow 30 Series Aquarium Filter Kit

$49.95 Chewy Price

$64.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Tetra Whisper Aquarium Power Filter, 5-10 gal

Rated 3.7 out of 5 stars

$18.04 Chewy Price

$20.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

SunSun HW-602B Aquarium Canister Filter, 20-gal

Rated 5 out of 5 stars

$34.96 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Tetra Aquarium Filter

$14.69 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

SunGrow Hang On Back Aquarium HOB Filter for Small Turtle & Betta Fish Tank Maintenance

$13.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon QuietFlow Canister Filter, 100-150 gal

Rated 3.3 out of 5 stars

$199.95 Chewy Price

$229.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Eheim Aquarium Prefilter

$16.47 Chewy Price

$17.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Marineland Magnum Polishing Internal Filter, 97-gal

Rated 3 out of 5 stars

$87.65 Chewy Price

$96.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

OASE Indoor Aquatics Filtosmart 60 External Fish Filter

$74.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Eheim Classic 2215 Aquarium Filter, 95-gal

Rated 2.3 out of 5 stars

$189.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Lee's Aquarium & Pets Wooden Aquarium Air Diffusers, 2 count, 3-in

$8.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

OASE Indoor Aquatics Oxymax 200 Fish Filter

$35.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Penn-Plax Cascade Bio-Sponge 500 Aquarium Filter, Medium

Rated 3.7 out of 5 stars

$7.54 Chewy Price

$8.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Eheim Pro 4+ 350 Aquarium Canister Filter

$255.31 Chewy Price

$279.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Penn-Plax Cascade 300 Internal Aquarium Filter

$20.33 Chewy Price

$28.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aquael Ultramax 2000 External Water Filter

$320.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Eheim Pro 4+ 600 Aquarium Canister Filter

$249.75 Chewy Price

$255.57 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Aquarium & Fish Tank Filters

Aqueon Quietflow E Internal Power Filter, 10-gal

Fluval Aquarium Underwater Filter, 12-30 gal

Fluval Aquarium Power Filter, 70-gal

Penn-Plax Cascade 170 Internal Aquarium Filter

Marineland Multi-Stage C-530 Aquarium Canister Filter, 150-gal

SunSun HW-302 Aquarium Canister Filter, 75-gal

Aqueon QuietFlow 20/75 Carbon Reducing Specialty Aquarium Filter Pads, 2 count

Underwater Treasures Seapora Rite-Fit PF10/30 Medium/Junior Cartridge Power Aquarium Filter, 3 ...

Aquatic Life RO Buddie Four Stage Osmosis System, 50-gal

Lee's Aquarium & Pets Round Under Gravel Aquarium Bowl Filter, Large

SunSun HW-603B Aquarium Canister Filter, 20-gal

Tetra Whisper Aquarium Internal Filter, Black, 4-gal

Fluval Underwater Filter Poly/Carbon Cartridge, 2 count

OASE Indoor Aquatics Biostyle 50 Fish Filter, Dark Blue

Penn-Plax Cascade Aquarium Bio-Sponge 1200 & 1500 Filter, Medium

Aquatic Life RO Buddie Three Stage Osmosis System, 50-gal

Aqueon QuietFlow 10 Series Aquarium Filter Kit

Penn-Plax Fishbowl Filter Kit

Eheim Classic 250 External Aquarium Canister Filter

Aqueon QuietFlow 30/50 Carbon Reducing Specialty Aquarium Filter Pads

Penn-Plax Cascade 100 Power Hang-On Filter

Marineland Penguin 75 Power Filter

Aqueon QuietFlow 30 Series Aquarium Filter Kit

Tetra Whisper Aquarium Power Filter, 5-10 gal

SunSun HW-602B Aquarium Canister Filter, 20-gal

Tetra Aquarium Filter

SunGrow Hang On Back Aquarium HOB Filter for Small Turtle & Betta Fish Tank Maintenance

Aqueon QuietFlow Canister Filter, 100-150 gal

Eheim Aquarium Prefilter

Marineland Magnum Polishing Internal Filter, 97-gal

OASE Indoor Aquatics Filtosmart 60 External Fish Filter

Eheim Classic 2215 Aquarium Filter, 95-gal

Lee's Aquarium & Pets Wooden Aquarium Air Diffusers, 2 count, 3-in

OASE Indoor Aquatics Oxymax 200 Fish Filter

Penn-Plax Cascade Bio-Sponge 500 Aquarium Filter, Medium

Eheim Pro 4+ 350 Aquarium Canister Filter

Penn-Plax Cascade 300 Internal Aquarium Filter

Aquael Ultramax 2000 External Water Filter

Eheim Pro 4+ 600 Aquarium Canister Filter

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