Aquatop's premium ceramic rings provide a large surface area for beneficial bacteria to grow and cultivate, which in turn provides you with better filtration. These good bacteria grow in the pores of the ring and eliminate harmful ammonia and nitrite levels in your aquarium water. Each ring measures roughly .5 inches in diameter and .6 inches in height.
Helps break down and remove harmful ammonia and nitrite
Suitable for freshwater and saltwater filters
Includes mesh bag