Bestway 59020 | Chlorine three actions: chlorination, anti-algae, bluing. Slow dissolving tablets of g 200 (trichloroisocyanuric acid) TRIPLE ACTION: chlorine – anti-algae – flocculant dosage. They are able to slowly but regularly increase the level of chlorine, in order to oxidize the microorganisms (bacteria, fungi, algae) in the pool, exerting an anti-algae and flocculating action, thus guaranteeing the clarity of the water. To be used mainly in pools with PVC structure and above ground. Individually blistered tablets. Please note: Avoid contact with aluminum, copper, chromed surfaces, wood and cork.Average dosage: 1 tablet every 30 m3 of water every 7 days. Swimming pool chlorination: the pH must be between 7.2-7.6. The tablets can be placed in the skimmer basket, in the dissolving dispensers. The amount of use of the product depends on the climatic conditions, the exposure to the sun, the frequentation of the pool and the operating time of the pump.