Each gallon of Pond Keeper Pro is the equivalent of 10 regular strength gallons! This concentrated formula simplifies the treatment of larger ponds and lakes in addition to saving on shipping cost and storage space. Pond Keeper Concentrate is an economical way to bring biological balance back to your large pond or lake and restore health and water clarity. Pond Keeper Pro naturally reduces problematic nutrients and organic waste for a healthy, clean and beautiful pond. APPLICATION (per 3 ft of average water depth): Normal Ponds: Initial Application –1 gallon per surface acre Maintenance – ½ gallon per month Slightly Troubled Ponds: Initial Application – 1 gallon per surface acre Follow Up – ½ gallon per week for 4 weeks Maintenance – ½ gallon per month Troubled Ponds: Initial Application – 1 gallon per surface acre Follow Up – 1 gallon per week for 4 weeks Maintenance – 1 gallon per month Note: Each additional three feet of water depth should be treated with another full application of product for the specific size body of water being treated. For example: 1 Surface Acre of water at 6 feet average depth = 2 concentrated gallons for the first treatment and 1 gallon per month.