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Shock Chlorine

Unstabilised Chlorine granules are also known as "Shock Chlorine". As a sanitiser, Calcium Hypochlorite is usually preferred for indoor pools where the effects of sunlight are less. When used outdoors, a separate stabiliser must be added to slow chlorine loss in sunlight.
Add shock chlorine at night so that it can work in the dark to maintain its strength for longer.

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Blue Horizons Granular Shock Chlorine 2kg

Blue Horizons Granular Shock Chlorine 2kg£22.99   £16.70

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Blue Horizons Granular Shock Chlorine 5kg

Blue Horizons Granular Shock Chlorine 5kg£57.99   £25.90

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