Clarity is the ultimate clarifier for both freshwater and saltwater aquariums. It employs an advanced polymeric flocculating agent that is both reef and plant safe. It is the only clarifier on the market that does it all. Clarity will clear all types of clouding: bacterial and other biological type blooms; chemical clouding; and particulate clouding. When clarity clears up bacterial clouding it helps to accelerate and enhance the colonization of the biological filter by efficiently relocating these natural biofilms to the biosupport media in the filter. Treats up to 2;000 gallons.