• AZOO Mignon Filter 60

    Nano aquarium hang on back filter. Rated for aquariums up to 3-1/2-gallon.

    • Color: Smoke Gray
    • Brand: AZOO
    • ASIN: B005VEWCMO
    • UPC: 731565410965

  • Elite Underwater Mini Filter, UL Listed

    The Elite Mini Underwater Filter is designed specifically for small aquariums up to 3-gallon. Its compact size makes the filter easy to conceal in any setting. The Elite Mini comes complete with a foam filter insert, ideal for mechanical and biological filtration. Replacement media is available specifically for the Elite Mini Underwater Filter.

    • Brand: Elite
    • ASIN: B0009YD7D4
    • UPC: 015561101301

  • Penn Plax Cascade Mini Hang-on Aquarium Filter With Activated Carbon and Sponge For Small Aquariums Cleans Small Up to 7 Gallon Tank

    The Penn Plax Cascade Mini Hang On Aquarium Filter is the perfect choice for smaller aquariums and fish tanks. This filter features an activated carbon cartridge that removes harmful chemicals, toxins, and odors from your small aquarium. Filter also utilizes an internal sponge which optimizes colonization of beneficial aerobic bacteria while the polyfiber cartridge traps floating particulates. This hang on aquarium filter attaches easily to your tank by sliding over the edge of the glass. A leveling device keeps your filter in position and the self-priming intake tube has a built-in extendable stem to allow placement of the intake strainer close to the bottom of most aquariums. Filter includes an adjustable flow control knob to reduce filtration during feeding times or as needed, and the quiet and efficient motor is maintenance free. The Penn Plax Cascade hang on filter delivers up to 20 gallons of water per hour and is suitable for fish tanks up to 7 gallons. It measures 5.2 inches high by 4.8 inches wide by 3.5 inches deep and is suitable for both freshwater and saltwater tanks. The Cascade Aquarium Filter Comes with activated carbon cartridges and is ready to use.

    • Brand: Penn Plax
    • ASIN: B00T6HPZFI
    • UPC: 030172070990

  • PENN PLAX World Aquarium Filter, Small

    Small World Aquarium Filters are specifically designed for small aquariums of all shapes and sizes up to 5 gallons. Quick and easy to install, Small World Aquarium Filters keep your water crystal clear while eliminating contaminants and maintaining a healthy environment for your fish. 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. The high quality disposable cartridge consists of carbon and zeolite for chemical filtration combined with a bio foam sponge. The zeolite crystals eliminate ammonia while the top quality activated carbon removes harmful gases and odors. The bio foam helps promote biological filtration leaving you with crystal clear water. These filters attach easily to any air pump (not included) using your existing tubing and will help keep your small aquarium healthy and looking beautiful.

    • Brand: Penn Plax
    • ASIN: B0002565KC
    • UPC: 764999868804

  • Tetra Whisper In-Tank Filter 3i for 1-3 gallon aquariums (25846)

    For the ultimate in convenience and quiet, choose a Whisper In-Tank Filter. This filter mounts on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall. The 3i In-Tank Filter uses air bubbles to move water up the airlift tube and through the filter cartridge making it ideal for keeping small fish and breeding fish. The Whisper In-Tank filter adjusts easily to high or low water levels with mounting clamps. Each unit includes the filter, air pump, two feet of airline tubing and one Small Whisper Bio-Bag filter cartridge.

    • Brand: Tetra
    • ASIN: B000HHQ712
    • UPC: 046798258469

  • Aqueon Quietflow E Internal Power Filter, 3 gallon

    Economical, efficient and easy to use describe this internal power filter. For use with frameless or framed aquariums. Easy to position with suction cups to attach on the aquarium. The filters provide chemical filtration. Includes: Carbon Cartridge - chemical filtration (odors and discoloration).

    • Brand: Aqueon
    • ASIN: B06XW2B39Z
    • UPC: 015905069908

  • Jardin Aquarium Fish Tank Mini Biochemical Sponge Filter

    Simply install an airline into the unit and provide both aeration and filtration for your fish. Aerobic bacteria colonize the sponge providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Fish Tank Sponge Filter traps waste particles mechanically cleaning the water without trapping the baby fish. Mini Aquarium Filter featuring a weighted plastic base that keeps the unit from floating during use, and cylinder design to eliminate dead space between the filter. Easy to clean, simply rinse and squeeze sponge under cool running water.

    • Brand: Jardin
    • ASIN: B008FLWR0M
    • UPC: 610256169712

  • Aqueon QuietFlow Filter Cartridge, Small, 3-Pack

    Patented dual-sided dense-floss cartridges contain over 25% more activated carbon than the leading brands. These unique cartridges were designed to ensure even distribution of carbon throughout for more thorough filtration and longer cartridge life.

    • Brand: Aqueon
    • ASIN: B005HRR1HG
    • UPC: 015568922008

  • Biochemical Sponge Betta Filter for Aquarium - High efficiency filtration breaks down toxic waste - Clear water in ONE day by help of nitrifying bacteria - Slow current - Perfect for fry & small fish

    What Size tank can I use this cotton sponge filter for? This cotton biochemical sponge filter will effectively and efficiently clean up to 10.5 gallon tank. If you own a larger tank you can purchase two or more of these sponge filters and place on different sides of the tank. You can easily hide these filters behind plants and other underwater d├ęcor. Why should I use an air pump with this filter and not a water pump? We recommend the air pump method as it is much easier for beginner aquarium keepers to set up. Simply attach some airline tubing and an air pump to the filter cylinder. The air pump is noiseless and won't disturb your fish. It can be used in a "hospital tank", breeding or rearing tank, or as a tank for fish who prefer a slower current flow such as Betta or Discus. Can I use this sponge filter in conjunction with a HOB (Hang on back) filter? Yes. Even if you already have another filter in your tank, you can use the sponge filter at the same time to achieve optimal filtration for your tropical fish tank. Your best results will be achieved by placing the sponge filter on one side and the hang-on power filter, or any other filter, on the opposite side. The air pump with the sponge filter will actually outperform many power filters and it provides superior vertical cir...

    • Brand: SunGrow
    • ASIN: B06XKLG9HW
    • UPC: 791043305428