These popular easy to use 50g floc tablets should be applied weekly to prevent hazy water or alternatively if water clarity is poor. Use with sand filters only and apply via a clean and empty skimmer basket. Aqua Sparkle Tablets work in conjunction with the sand filter to remove fine particles from the pool, helping you achieve crystal clear water. Maintain pH levels within the ideal range 7.2–7.6. Adjust if necessary. Maintain total alkalinity within the ideal range of 80–150mg/l(ppm). Adjust if necessary. Maintain chlorine levels within the ideal range 1–3mg/l(ppm). Adjust if necessary. Backwash the filter and then return to the normal filtration setting prior to use.