Bio Balls, 50 Pcs Aquarium Biochemical Filter Media Canister for Fish Tank Pond(16mm)

[HIGH POROSITY] Highly porous 16mm bio balls create a multi faceted surface that helps beneficial attach and grow improving biological filtration and supporting cleaner water. [BIO FILTRATION] Internal zigzag spaces help extend water contact time through the media so can work more effectively to support stable water quality in aquatic habitats. [SIZE FIT] Compact 16mm size is suitable for limited filter space making these balls easier to place in aquarium filter systems while helping maximize biological media capacity. [WIDE USE] Designed for freshwater biochemical filtration and also suitable for seawater systems ideal for fish tanks ponds and aquariums that need reliable biological filter media. [PVC SPONGE 50PCS] Made of PVC and sponge in black color this set includes 50 biochemical balls that are lightweight easy to carry and practical for daily aquarium filter maintenance.