Contains: Sodium Dichloroisocyanurate & Trichloroisocyanuric Acid Function: Sanitiser for pools. Each 200gram tablet contains a combination of trichloroisocyanuric acid and sodium dichloroisocyanurate.
The 'dichlor' provides a quick boost of chlorine allowing you to get chlorine into the water in a quick and effective manner.
The 'trichlor' provides a long-lasting source of chlorine allowing you to maintain a sufficient level of chlorine in the water.
Dosing Rates Pool-Skimmer: 1 tablet per 10,000 gallons of pool water. It will take 3 to 5 days to dissolve. Pool-Floating Dispenser: Add 1 tablet per 7,000 gallons of pool water. It will take 10-14 days to dissolve.
Health and Safety guidelines and Dosing Information for Duo Tabs can be found in our Information section on the left hand side or by clicking on the product name below.
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Pool Chemicals 
