Aquascape® 40002 1 qt Beneficial Bacterial Refill. Aquascape Beneficial Bacteria is a liquid water treatment that helps to provide clean, clear, and healthy water conditions, significantly reducing pond maintenance. Each bottle of Beneficial Bacteria is packed full of eight pure strains of concentrated beneficial bacteria and is completely safe for fish, plants, pets, and wildlife. Our Beneficial Bacteria effectively reduces fish waste, organic plant material, sludge, and excess nutrients in your pond, allowing you to spend more time enjoying your water feature and less time maintaining it. Our bacteria contains a 1.5 billion CFU per ounce potency, ensuring 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.