Robelle Total Alkalinity Control Increaser 2256 For Swimming Pools-10 lbs Helps Raise Total Alkalinity Without Raising pH Ideal Reading Should be 100-120 ppm Add 1 lb per 7,500 Gallons of Water Compares To: BioGuard Balance, Pak 100 and In The Swim Note: We cannot ship this item to Alaska, Hawaii, Canada or Puerto Rico. We apologize for inconvenience this may cause