Aquascape Cold Water Beneficial Bacteria Professional Grade helps to provide clean, clear, and healthy water conditions in water as cold as 32 degrees Fahrenheit, significantly reducing pond maintenance. Each bottle is 25% more concentrated than the consumer equivalent and packed full of eight pure strains of concentrated bacteria. Our bacteria will effectively reduce fish waste, ammonia, nitrite, and organic debris in ponds. A 4.5 billion CFU per ounce potency ensures consistently effective treatment, and the included marigold and vitamin B help to bring out the natural colors of your fish while maintaining proper fish health. The included measuring cup and dosage guide make application simple and easy. Each bottle contains 1 gallon of treatment and treats up to 96,000 gallons of water. Cold Water Beneficial Bacteria Professional Grade is completely safe for fish, plants, pets, and wildlife.