Aqua Eden Cold Temp Beneficial Bacteria blend, is scientifically enhanced and tested to ensure maximum results in watergardens. Our cold water formula is specifically suited for cold water pond applications, with proven hardy strains, enhanced enzyme functions, and metabolic increasing carriers. Beneficial pro-biotic bacteria contains beneficial pro-biotic microbes, enzymes and electrolytes that work in symphony toreduce sludge, uneaten fish food, fish waste, and other excess nutrients that cause poor water quality and clarity. Our cold dissolvable blend is the most concentrated pro-biotic supplement available in its class, at over 1 billion colony forming units per gram!