Aquarium Internal Filters
Lees Triple-Flow Corner Filters are uniquely designed with 3 intake vents to provide maximum efficiency. This versatile filter may be used for biological, chemical, or mechanical filtration, depending on the media chosen for use in the filter. May also be used as the fundamental or back-up filter.
- Great for breeder tanks, isolation tanks and for beginner aquarists
- Triple Flow Corner Filters available in different sizes
- Requires an air pump - air pumps sold separately
Small: Filters up to 45 GPH (3.25"L x 3.25"W x 5"H)
Medium: Filters up to 75 GPH (3.5"L x 3.5"W x 5.5"H)
Large: Filters up to 100 GPH (4"L x 4"W x 6"H)
- $10.95 - $103.95
- Save $55 (53%)
The Penn-Plax Cascade Internal Filter by Penn Plax is designed for better filtration and aeration above and below the surface! The spray bar distributes water evenly over the waters surface to aid in aeration for healthier, cleaner aquarium water.
- Efficient chemical and biological aquarium filtration
- Removes harmful toxins, odors, discoloration and more
- Spray bar provides essential aeration for healthier environment
The Cascade Internal Filter provides crystal clear water for freshwater and marine aquariums, and is great for aquatic terrariums too. Activated carbon cartridge media is included for efficient chemical filtration of harmful chemicals, toxins, odors, discoloration and other contaminants. The carbon cartridge is easy to replace for simple maintenance. The internal sponge optimizes colonization of beneficial aerobic bacteria, which remove ammonia and nitrates for safe, healthy water. A large capacity internal filter cup lets you choose your own filter medium as well.
The pump head features adjustable and directional water flow. An included elbow fitting easily attaches the spray bar to the pump for even water return distribution. The filter may be placed vertically or horizontally. UL-listed for safety.
Cascade 300: 70 GPH (Up to 10 Gallons)
Cascade 400: 110 GPH (Up to 20 Gallons)
Cascade 600: 175 GPH (Up to 50 Gallons)
Warranty: 3 years.
- $33.95 - $77.95
- Save $41 (53%)
Lees Economy Corner Filter is ideal for small aquariums and aquarium kits. Lees low-cost, high-quality Economy Corner filter keeps tanks sparkling clean without the use of an airstone.
- Keeps aquariums up to 10 gallons sparkely clean
- The basket insert is injection-molded to eliminate unstable tubes
- Corner Filter Dimensions - 3"L x 3"W x 3.5"H
- $8.95 - $98.95
- Save $52 (53%)
Marina i25 Internal Filters are compact and powerful! These internal filters easily clip onto Marina goldfish aquariums and can also fit any other goldfish or tropical tank that is up to 6.6 Gallons with secure suction cups.
- Compact and powerful
- Waterfall spout for oxygenation
- Ideal for goldfish and tropical tanks
The Marine i25 Internal Filters are extremely quiet due to the fact that their motors are submerged under water. The i25 filter comes with one power cartridge that is designed to enable the water to enter the center of the cartridge for effective mechanical, chemical and biological filtration. Once water has entered the center it enters the zeolite chamber so toxic ammonia can be removed, then it enters the 2nd chamber which has the carbon so that polutants and odors get removed as well.
The i25 traps debris inside the cartridge to ensure crystal clear water and the cartridge can be changed easily with no mess and no hastle!
- Save $13 (54%)
The Smallworld Air Filter fits all aquarium shapes and sizes. Contains top quality carbon/zeolite for chemical filtration, and is a convenient, disposable filtration unit. This filter includes a bracket measuring 4-1/2"x 1-1/2"x 1" and fits in almost any small aquarium with an easy to replace disposable cartridge filter.
- Compatible with any air pump - air pump sold seperately
- Filter removes harmful gases, odor and discoloration
- Disposable, quick and easy to use filtration unit
- $10.95 - $66.95
- Save $35 (53%)
Supreme Ovation Submersible Filters are perfect for all types of tropical fish aquariums and todays complex aquatic terrarium habitats. It is a reliable, smooth-running power filter that provides excellent mechanical, biological, and chemical filtration.
- Use in aquariums and terrariums
- Features an adjustable air regulator for aeration flow control
- Filter kit includes power filter, filtration sponge, activated carbon cartridge, and a modular tubing kit
- Dimensions: 1.25"L x 1.5"W x 5.25"H
- Flow rate: 53 GPH
- Aquarium size: Up to 15 Gallons
Replacement Filtration Pak includes (1) filtration sponge and (1) activated carbon cartridge. The modular tubing fits into the top portion of the filter (see directions and picture on the box).
- $24.95 - $80.95
- Save $42 (54%)
Tetra Whisper In-Tank Power Filters provide the ultimate in convenience and quiet. These filters mount on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall.
- Motor is under the water for extremely little noise
- Functions in as little as 2 inches of water
- Includes one pre-assembled Whisper Bio-Bag filter cartridge
In-Tank Filters are unusually quiet, since the motor is under the water. Offering the same quality and performance as an external filter, the Whisper In-Tank Filter will function in as little as 2 inches of water -- making it ideal for turtle tanks, or for creating a waterfall inside the tank.
Whisper In-Tank filters adjust easily to high or low water levels with mounting suction cups and/or clip. Each filter includes one pre-assembled Whisper Bio-Bag filter cartridge and mounting clip.
- 4i: Aquariums up to 4 Gallons, 24 GPH, Use S Cartridge.
- 10i: Aquariums up to 10 Gallons, 90 GPH, Medium Bio-Bag. 4.2"L x 4"W x 8"H
- 20i: Aquariums up to 20 Gallons, 125 GPH, Large Bio-Bag. 4.9"L x 5.4"W x 10.2"H
- 40i: Aquariums up to 40 Gallons, 170 GPH, Large Bio-Bag. 5.1"L x 5.9"W x 10.5"H
- $16.95 - $45.95
- Save $24 (54%)
Marineland Magnum Internal Polishing Filters provide complete 3-stage aquarium filtration with an additional water polishing option. This self-contained internal filter is quiet, requires no priming, and has no external tubing.
- Compact and versatile micron water polishing
- Powerful 3-stage filtration
- Crystal clear water overnight
The Magnum Polishing Internal Filter contains a dual-chamber media container, allowing customizable media selection. The included Marineland Rite-Size JH Floss Sleeve removes suspended dirt and particles, while the Micron Cartridge provides fine filtration for crystal clear, polished water. The Micron Cartridge may also be charged with diatomaceous earth (not included) for even more powerful filtration.
Magnum Internal Polishing Filter
Rite-Size JH Floss Sleeve
Black Diamond Premium Activated Carbon
- 290 GPH
- Aquariums up to 97 gallons
- For Rite-Size JH Floss Sleeve
- 8.5"L x 5.8"W x 11"H
- Save $72 (53%)
The Penn Plax Small World Fishbowl Filter Kit is designed for round or drum fish bowl or tank containers with at least a 4-inch opening. Once assembled, simply place the filter inside your completely empty aquarium, cover it with your choice of gravel, marbles or stones, and then fill it with water. You can also adjust the air flow on the Penn-Plax Smallworld filter kit with the included air valve. Filter kit includes: adjustable filter plate, lift tube, replacement filter cartridge, air-stone, adjustable air valve, air pump and airline tubing
- Adjustable filter plate
- Adjustable air flow
- Fits any drum or round fishbowl with 4 inch opening
- Kit comes complete
- Save $21 (52%)
The Elite Goldfish Bowl Accessory Kit provides you with all the necessary tools to continue to keep your fishbowl in top condition. The kit comes with a replaceable filter cartridge, an under gravel filter plate, an Elite 799 Air Pump, 20" of airline tubing and a plastic plant. The Elite Goldfish Bowl Accessory Kit is a great way to ensure your tanks filtration will operate smoothly.
- Provides Filtration for Your Small Aquarium
- Kit Comes With Tools to Help Keep Your Small Aquarium Clean
- Helps to Keep Water Clear
- Comes With Small Plant So Your Fish Can Hide
- Great for Aquariums up to 1 Gallon
NOTE: Install air pump on a level surface above the aquarium. If the air pump is placed below the waterline always use a check valve. Never place the air pump where it can come in contact with water. Verify that the airline is kink-free and that the attachments are clean and do not restrict airflow.
- Save $15 (52%)