A highly concentrated liquid sanitizer used to reduce excess levels of chlorine or bromine after shocking. Knock Out will not affect the colouring of vinyl, cement, or fibreglass pools.

Knock Out, 1L

    Barrie Fibreglass Pools & Spas


    1139 Bayfield St. N.

    Midhurst, ON L9X 0N6

    Tel: 705-728-3500

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    © 2017 by Barrie Fibreglass Pools & Spas.