Reformulated AquaClearerTM Extreme Cold Water Liquid For Use in Spring or Fall Aquascape Cold Water Beneficial Bacteria contains 7 pure strains of concentrated beneficial bacteria that go to work quickly cleaning and balancing your ornamental pond, works at temperatures below 50F or 10C. Aquascape Cold Water Beneficial Bacteria maintains a strong biological balance providing clean, clear and healthy water conditions. Maintains a balanced ecosystem Reduces pond maintenance Reduces ammonia, nitrite and organic debris Safe for fish, plants or animals that may drink pond water 1.5 billion CFU per ounce Contains marigold and vitamin B Note: 1 bottle treats up to 20,000 gal./75,684 liters 1 pump treats up to 100 gal./378 liters. Check out our TJB-INC Amazon Store for more ideas & products.