pH Down lowers elevated pH levels from new plaster surfaces, algae and some pool chemicals - factors that can make your pool cloudy, irritate skin, form scale on equipment and surfaces and deplete available chlorine.
pH Up corrects low levels of pH caused by rain, new vinyl liners, swimmers and some chemicals. Even though your water may appear clear, low pH levels often lead to eye irritation and corrosion of equipment and pool surfaces.
Stabilizer fortifies unstabilized chlorine to help protect it from sunlight burn-off. After all, while a sunny day is great for you and your family, it’s not great for chlorine - burning it off the longer it’s exposed to sunlight.