Aquascape 96021 Cold Water Beneficial Bacteria for Pond and Water Features, 1-Gallon Combination of natural cleaners helps to provide clear, healthy water; maintain a strong biological balance in your pond Ideal for cold water, down to 35-degrees F; 8 pure strains of concentrated beneficial bacteria; ; reduces ammonia, nitrite and organic debris 1.5 billion CFU per ounce potency, ensuring consistently effective treatment Safe for fish, plants, pets, and wildlife Easy-to-use pump top; 1-gallon bottle treats 80,000 gallons of water; single dose (1 pump) treats 600 gallons