Mini size, 5.5cm diameter x 4.8cm long sponge great for nano aquaruiums.

The biochemical cotton filter takes the air pump as the power source, with high lifting power, no noise, and improves the dissolved oxygen in water. It combines the principles of mechanical filtration and biological filtration and uses multi-layered filtration to cultivate high-density digestive bacteria to achieve cleanliness and good water quality stability. It is suitable for all kinds of ornamental fish breeding, breeding and juvenile fish cultivation. Bio-sponge filter features silent operation, and has an excellent filtering effect while oxygenating the water. The special developed foam materials support the colonization of bacteria, allowing for mechanical filtration in addition to biological filtration, which will break down harmful waste, ammonia and nitrate material, resulting in a cleaner living environment for your fish, particular they are useful as a breeding filter or as secondary filter.

Features:

• Increase the amount of dissolved oxygen in the feeding water. Noise-free and electricity-saving.

• It can be combined with round barrels, plug-in and upper filtration for pre-fine filtration.

• Cylindrical filtration has no dead angle, which is very effective. It provides a large surface area for high-density nitrous bacteria.

• Prevent sucking in fry and small fish. 

• Quality sponge foam assures greater working life and its porous foam tissue forms large and ideal Surface area for bacteria colonization.

• Supplying the water with much needed oxygen.

• It reduces noise from air pump and consumes the lowest wattage.

• Most fit to external or top filter as prefixed unit