Hydor Rings in Sintered Quartz BIO-RINGS for Organic Substrate, Fresh and Marine Water

Sintered quartz rings indicated as a biological substrate for marine and freshwater aquariums.They favor the development of beneficial bacterial colonies in the large available surface, allow the elimination of toxic ammonia.They do not release phosphates, heavy metals or other substances harmful to the life of the fish, they maintain the pH of the aquarium unchanged.450 g pack for great versatility of use. The rings can be inserted into the internal or external filters inside the special biological compartments.