HTH Clear 4 Weeks Shock

Kills bacteria & algae. High strength. Boosts chlorine level. Quick dissolve, fast acting. Non-stabilised chlorine. Size: 500g Directions for use: Test your pool water using either your HTH 4-in-1 Test Kit or HTH Quick Test Strips, maintain your pH between 7.2 - 7.6. In the early evening, add one sachet of HTH Shock It or HTH Super Shock It around the sides of the pool. Run the filter for 24 hours. After the first 12 hours, check and re-correct the pH level. Continue with normal chlorination program. Only enter the pool when chlorine residual is <3ppm. Tip In case of a vinyl or coloured lining, pre-dissolve HTH Shock It or HTH Super Shock It in a bucket of water to prevent bleaching. Shock treating fixes 90% of pool water problems in 24 hours provided that your pH is correct.