Aquatop Premium Quartz Rings with Mesh Bag Filter Media White, 1ea/28 oz

AQUATOP's FORZA Premium Quartz Rings provide a massive surface area for the intensive colonization of beneficial bacteria to grow. Made from sintered (heated and compressed) inert quartz, beneficial bacteria grow and colonize in the pores of the quartz rings which helps to eliminate harmful ammonia and nitrite levels in your aquarium water.