Microbe-Lift/PL is specially formulated for decorative fish ponds and aquatic lagoons. Microbe-Lift/PL is all natural, nonpathogenic, nontoxic, and noncaustic. Simple to use: Microbe-Lift/PL continues to provide sustained biological activity even in water temperatures under 55 degrees F. Microbe-Lift/PL: Creates a healthy pond environment Helps reduce ammonia nitrogen levels Contains photosynthetic bacteria and heterotrophic bacteria which help clarify cloudy water by promoting flocculation and settling of organic and inorganic particles Seeds and maintains biological filters Improves dissolved oxygen levels Digests organic sludge reducing the frequency of cleaning Reduces buildup of waste from fish and waterfowl Reduces biological oxygen demand of water Reduces unpleasant odors Breaks down dead algae Safe for fish and plants and household pets that may drink from the pond Each one of these 32 ounce bottles will treat up to a 200 gallon pond through all stages.