Pond Clarifier contains over 60 Billion beneficial organisms 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 also seeds and maintains your pond's biological filter. Pond Clarifier is 100% natural and safe for all fish, plants and other aquatic life.. Pond Clarifier two pack treats up to 10,000 gallons of pond volume. Dosage Rate: 10,000-gallon pond use 2 tablets per month - 5,000-gallon pond use 1 tablet per month - 2,500 gallon pond use 1/2 tablet per month - under 1,000 gallons use 1/4 tablet per month. pH should be above 6. Turn UV off for three days while applying the tablet.