EasyPro Pond Products PB10X 20 Count Pond-Vive Bacteria X Water Soluble Supplement, 8 oz Initial Dose 4 to 6 lbs. per surface acre Maintenance Dose 4 to 6 lbs. per surface acre every 2 weeks Bottle Treats 1/4 acre up to 5 months EasyPro Pond-Vive Bacteria X, 20ct. 8oz Water Soluble Packs (approx. 10lb pail)