With spores allows beneficial bacteria to colonize and breakdown of ammonia and nitrite. Also it helps to revitalize water and increase ORP and oxygen. It doesn’t affect pH. With spores in suitable for fresh water aquarium, planted aquarium, marine tank. This large spores ceramic ring can host large numbers of beneficial bacteria than the normal white spores less ceramic ring. Red Ceramic Rings are capable of supporting large populations of water purifying bacteria. The multitude of tiny pores can support these colonies of beneficial bacteria. An ideal biological filter media that will make the most of any filter system due to its huge capacity to support the organisms responsible for metabolizing ammonia and nitrite. Due to its cylindrical shape, water flows through it easily and makes it less likely to clog.