Small Pond Biosphere Pro For Ponds (91160-50-S)
The Small Pond Biosphere Pro treats ponds from 6,000 gallons up to 50,000 gallons
I've been using this product all year long, along with a bi monthly bacteria booster. It is being used on a 50,000 gallon koi pond. I've been having great results, no issues with water quality, and my koi are healthy.