•Highly-porous ring with massive surface area that promotes colonization of beneficial bacteria
•Beneficial bacteria break down ammonia, nitrite, nitrate and dissolved nitrogenous compounds
•Promotes fast and efficient filtration
•Results in clearer, cleaner water
•Reduces frequency of water changes significantly
•Suitable for fresh and saltwater aquarium
•Ideal for canister filters and sumps
•Will not affect pH levels
•Can wash and re-use