Reduce organic buildup in your pond! TotalPond Sludge Remover maintains a healthy eco-system, improves pump and filter efficiency, and reduces organic build up. It also reduces odors produced as a result of organic decay. It contains over 20 billion powerful, naturally occurring beneficial bacteria that rapidly consume carbohydrates, proteins, starches, fats and cellulose debris that build up in ponds. It's ideal for use before adding new fish to your pond, doing a water change, opening your pond in spring, and closing it in winter. For the best results, use 48 hours after TotalPond Water Clarifier. One 16 oz. bottle treats up to 960 gallons of water. Add one capful (5mL) for every 10 gallons of pond or fountain water. Dose every two weeks once water temperatures are above 50°F; discontinue use once water temperatures are below 50°F. If an ultraviolet (UV) clarifier is present, turn it off before each dose and leave off for 5 days after each dose. TotalPond Sludge Remover is an environmentally safe product. When used as directed, this product is safe for fish, plants, domestic and wildlife animals. For ornamental water feature use only.