Sohler 1 LB Bio Ceramic Rings Aquarium Filter Media in 1 Free Mesh Bags

Amazon.com Price: $7.94 (as of 25/03/2022 06:55 PST- Details) & FREE Shipping.

Biological filtration media that helps remove harmful ammonia and nitrite in the water
Ready to use bags, convenient use for all types of filters. Good to use in both fresh and saltwater tank
The ceramic material that the ceramic rings is made of is porous. The tiny pores make it an ideal home for beneficial bacteria to grow.