Pond Clarifier contains over 60 Billion beneficial bacteria per tablet for crystal clear water in an average of 3 to 5 days. It also biodegrades sludge, waste, sediment, eliminates odors, removes excess ammonia, nitrites, nitrates and phosphates. Pond Clarifier seeds and maintains your pond's biological filter. Pond Clarifier is 100% organic & natural and safe for all fish, plants and other aquatic life. Pond Clarifier single pack treats up to 5,000 gallons of pond volume. Dosage Rages: 5,000 gallon pond use 1 tablet per month - 2,500 gallon pond use 1/2 tablet per month - Under 1,000 gallon pond use 1/4 tablet per month. Pond Clarifier contains cold water bacteria for year-round treatment. pH should be above 6. Turn off UV for three days while applying tablet.