Seachem clarity is the ultimate clarifier for both fresh and salt water it employs an advanced polymeric flocculating agent that is both reef and plant safe clarity is the only clarifier on the market that does it allr seachem clarity will clear all types of clouding bacterial and other biological type blooms chemical clouding and particulate clouding ie stirred up gravel bed when clarity clears up bacterial clouding it helps to accelerate and enhance the colonization of the biologica