Serenity Pico Sponge Filter SMXY-2833 Biological FiltrationAir DrivenSponge size 4cm X 4cmSuitable for Aquariums up to 8 litresThis filter is air operated and needs an air pump to run it. Air pumps are sold separately.Sponge filters are a biological filtration that builds up a colony a good bacteria that breaks down the ammonia and nitrite as water passes though them and also collect detritus to help keep a clean aquarium.Uses air via an uplift system to draw water through the sponge. A low wattage air pump using air system and doubles oxygenating the water. Simply connect to an air pump (Not included).
