Hikari Aquarium Solutions Bacto-Surge Foam Small Sponge Filter Betta Care should be taken to

Care should be taken to avoid over-feeding

Supports biological aquarium filtration

bacteria-free

The world's first daily diet for carnivorous cichlids containing beneficial living microorganisms

yet its impact on trace elements is minimal

Hikari Aquarium Solutions Bacto-Surge Foam Small Sponge Filter Betta Care should be taken toHighly porous sponge maximizes bacterial action Increased surface area offers maximum bacteria colonization Soft sponge material is easily cleaned Polyether foam for longer life Uplift tube and air diffuser combination provide maximum lift and won't easily clog Other uses: polishing filter for canister filter applications, hang on filter applications or uplift tubes of undergravel filters