Aquascape Contractor Grade Barley Straw Extract provides a natural method of clarifying pond water. Barley straw has been used for hundreds of years to promote clean and clear water conditions in ponds and streams. Each bottle is 25% more concentrated than the consumer equivalent, making it the ideal choice for discriminating pond professionals. Barley Straw Extract starts working instantly and the concentrated formulation contains added enzymes to help break down sludge and clean filter pads, significantly reducing maintenance. Our Barley Straw Extract is safe for fish, plants, pets, and wildlife. The included measuring cup and dosage guide make application simple and easy. Each bottle contains 1 gallon of treatment and treats up to 96,000 gallons of water.