Aquascape Barley Straw Extract for Pond and Stream Features, 1-Gallon | 96012 Natural method of clarifying pond and stream water Barley straw has been used for hundreds of years to promote clean clear water conditions Concentrated formula with added enzymes; starts working instantly Safe for fish, plants, pets, and wildlife Easy-to-use pump top; 1-gallon bottle treats 80,000 gallons of water; single dose (1 pump) treats 600 gallons