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Clear & Safe 1kg 20g Chlorine Tablets for Pool Spa Hot Tubs£10.69
Water in pools and spas should be tested daily you are aiming to achieve a pH level reading between 7.2 and 7.6 before adding the chlorine. Use pH+ or pH- to adjust if necessary. Pool free chlorine levels must be between 1ppm and 3ppm and spas should be between 3ppm and 5ppm .
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