7kg Certikin Swimfresh pH & Alkalinity Reducer (Dry Acid)
SwimFresh Water Balance ChemicalsSwimFresh Calcium Hardness Increaser Increase calcium hardness of pool water when it drops below 200mg/lSwimFresh Alkalinity Increaser Increase total alkalinity of pool water when it drops below 80mg/lSwimFresh pH & Alkalinity ReducerLower total alkalinity of pool water when it rises above 150mg/lSwimFresh pH IncreaserIncrease pH of pool water when it drops below 7.2SwimFresh pH & Alkalinity ReducerLower pH of pool water when it rises above 7.6