Aquascape Cold Water Beneficial Bacteria helps to provide clean, clear, and healthy water conditions in water 50 degrees and below, significantly reducing pond maintenance required. Each bottle of Aquascape Cold Water Beneficial Bacteria is packed full of eight pure strains of concentrated bacteria and is completely safe for fish, plants, pets, and wildlife. Our Cold Water Beneficial Bacteria effectively reduces ammonia, nitrite, and waste in the pond, allowing you to spend more time enjoying your water feature and less time maintaining it. The potency ensures consistently effective treatment and the included marigold and vitamin B helps to bring out the natural colors of your fish while maintaining proper fish health.