Scientifically blended and tested to ensure maximum results Perfect for new or overpopulated ponds Dissolvable blend of electrolytes, enzymes and probiotic microbes With over 1.5 billion colony-forming units per ounce, Helix Brand Liquid Beneficial Bacteria is the most concentrated probiotic supplement available in its class! An excellent all-around bacteria, and extremely easy to apply, this bacteria blend is perfect for new ponds or for regular pond maintenance. Perfect for temporary housing tanks for fish (if the pond is being worked on), as they are often overpopulated. Use 1 ounce per 1000 gallons -- monthly to maintain a healthy, pristine pond or weekly in an overstocked pond.