fishkeeper Submersible Aquarium Filter for 40-100 Gal 3-in-1 Biochemical Sponge Filter for Aquarium Filtration/Oxygenation/Circulation Up to 320 GPH Adjustable Internal Fish Tank Filter (8W/13W)

Penn Plax Cascade 600 Fully Submersible Internal Aquarium Filter, Crystal in Black/Blue | 11.5 H x 3 W x 4 D in | Wayfair CIF3

In addition to delivering crystal-clear water throughout the aquarium. This filter cycles water at 175 Gallons per Hour (GPH) for tanks up to 50 gallons in size. It’s great for freshwater and saltwater aquariums, along with a variety of terrarium... ... more

Cascade 1000 Aquarium Canister Filter, 265 GAL

Without effort, the Cascade 1000 Canister Filter quietly delivers crystal clear water throughout the tank. This filter cycles water at 265 Gallons per Hour, and is recommended for aquariums up to 100 gallons. It's compatible for both freshwater and... ... more

Penn Plax Aquarium Filter Wood (best for furniture style stands) in Black/Brown | 0.2 H x 6 W x 5.3 D in | Wayfair ONF4

Cascade presents the Powered Aquarium Nano Sponge Filter by PENN-PLAX. This sponge filter is specifically designed for aquariums that house fry, shrimp, and small fish. The two-ribbed sponges trap floating debris without sucking up smaller or weaker... ... more

Cascade 700 Aquarium Canister Filter, 185 GAL

Without effort, the Cascade 700 Canister Filter quietly delivers crystal clear water throughout the tank. This filter cycles water at 185 Gallons per Hour, and is recommended for aquariums up to 65 gallons. It's compatible for both freshwater and... ... more

Cascade 500 Aquarium Canister Filter, 115 GAL

Without effort, the Cascade 500 Canister Filter quietly delivers crystal clear water throughout the tank. This filter cycles water at 115 Gallons per Hour, and is recommended for aquariums up to 30 gallons. It's compatible for both freshwater and... ... more

Fluval 30 Aquarium Power Filter, 150 GAL

Quiet, efficient and reliable Aqua Clear 30 pumps 150 gph. Recommended for aquariums up to 30 gallons. Aqua Clear stands alone as the only aquarium power filter that offers the integrated filtration of the CycleGuard Insert System. Aqua Clear combines... ... more

L Shape Sponge Filter, L60, 16 gal/hr

These air operated internal filters work as a mammoth or airlift pump. It is pushed into the standpipe via a hose by an air pump. The air draws aquarium water upwards with it in there, water flows back through the fine mesh sponge that provides an... ... more

L Shape Sponge Filter, L150, 40 gal/hr

These air operated internal filters work as a mammoth or airlift pump. It is pushed into the standpipe via a hose by an air pump. The air draws aquarium water upwards with it in there, water flows back through the fine mesh sponge that provides an... ... more

Hang on Back Canister Filter, 3.67 LBS

Dennerle Hang-on external filter. For up to 30g Aquarium this easy to use and maintain filter will keep your freshwater aquarium crystal clear. 3 stage filtration with Prefilter Sponge, high performance bio-filter and fine filter pad. ... more

Betta Filter Cartridge, Pack of 2

Keep your betta's home spick and span with our Aqueon Betta Filter Cartridge Pack of 2. These bad boys are air-operated filters that work wonders in small betta habitats such as bowls and aquariums up to 3 gallons. The replaceable carbon and sponge... ... more

G3 Advanced Filtration System, 185 GAL

If you want an aquarium that's crystal clear, the Fluval G3 Advanced Filtration System is your new best friend! This super-sleek system is perfect for tanks up to 80 gallons and filters a whopping 185 gallons per hour. But that's just the beginning of... ... more