20kg (4x5kg Tubs) of Premium Quality RELAX Small 20g Multi-function Chlorine Tablets - 4 in 1 Tablets with added Algaecide and Water Clarifier. Each 5kg Tub contains approx 250 tablets. Orders before 1pm are dispatched the same day. Don't risk your Health, Swimming Pool or Hot Tub with cheap alternatives! The RELAX brand is manufactured by a UK company with over 50 years experience (Est, 1972) in the water treatment industry & supply one of the best Chlorine Tablets on the market today.