The Hikari Bacto-Surge Sponge Filter Kit provides unmatched biological and mechanical filtration and is well suited for delicate fry tanks, breeding tanks, quarantine applications, nano betta tanks as well as for sensitive, slow moving fish such as colorful & exotic discus. The high quality, porous sponge offers a sizable surface area with thousands of microscopic pores that encourage the growth and colonization of beneficial aerobic bacteria.Versatile and reliable, the unit can be used as a polishing filter for canister filter applications, in combination with hang on filters or be used as uplift tubes on undergravel filters. The durable sponge filter is composed of long-lasting polyether foam with an uplift tube and air diffuser combo that provides maximum flow and won't easily clog with debris. The filter improves oxygen levels and contributes to healthy water in your aquarium. Easy to clean and durable, the sponge comes in a mini size that is ideal for aquariums up to 40 gallons in size. 2" x 4.75" dia.
