ISTA 100pcs BIO BALL -S- - Aquarium Filter media Pond balls

?With a unique structure, it creates an enormous space for bacteria colonization which is many times larger when compared to traditional bio-ball. ?Helps in distributing smooth water flow through the filter. ?Compact in size to fit small filter or any other filtration system. Works with both marine and freshwater tank. ?Leads the water flow through a longer traveling distance within the Compact Bio Ball to more effectively decompose toxic ammonia and nitrite through biological filtration. ?Provides an excellent biological filtration ability to assure the best water quality.