About: FreshWater pH/Alkalinity Up is a granular product that raises pH and total alkalinity levels in hot water. Keeping your pH/Alk levels in range in your hot tub allows your sanitizers to keep your water effectively sanitized. It’s also important to keep your pH/Alk levels in range to keep you and your hot tub healthy.

Compatible With: Freshwater Ozone System, Freshwater Salt System, Frog @ease System, Bromine System, and more.

Instructions on bottle.