Brightwell Aquatics Erase CL Remover removes chloramines, chlorine, ammonia, and nitrites present in tap water and/or aquarium water. The CL remover may be used to neutralize iodine in the event of an aquarium overdose.It is safe for using directly in all marine and reef aquariums. It is Free of phosphate and silicate and is Stronger than most competing products. Formulated by a marine scientist.