When pool water has a low total alkalinity, it's difficult to maintain the pH of the water in the proper range of 7.2 7.6. This difficulty is commonly referred to as pH bounce. Low total alkalinity causes pitting, etching and weakening of plaster pool surfaces as well as corrosion of metal fixtures in the pool Alkalinity Plus is a great remedy for this Makes pH and chlorine levels easier to control For best results, always adjust Alkalinity BEFORE pH Weight 22lbs per tub About ecoone ecoone non-toxic pool and spa products were created for those who desire simple, nature-inspired, environmentally friendly products for their pool and spa Products are simple-to-use and take the guess work out of maintaining pools and spas Since 1997, ecoone has been the leader in developing natural-based pool and spa treatment systems The ecoone system reduces and/or eliminates the majority of your spa care chemical regimen including foam reducers, pH up, pH down, clarifiers, scum digesters, filter cleaning products and chlorine/bromine ecoone features Free of dyes, perfumes and fragrances Free of petroleum based chemicals no VOCs Made using enviro-friendly ingredients Natural ingredients means softer skin and less irritation to eyes Recyclable packaging Made in the USA