Sponge Filters backpack Niagara
Sponge replacement black for Niagara filter from the Italian line of Wave aquarium products. You can buy these filters and also carbon cartridges.
The sponge acts as a sieve that retains the waste and large derbies found in the water and also serves as a substrate where the bacteria that carry out the biological filtering are housed. Be careful to wash it only with water, without disinfectants so as not to remove them