Chlorine, PH & Alkalinity Test Strips, 3in1 for Hot Tub, Spa, Pool, Universal

3-in-1 - Tests Chlorine, PH & Alkalinity of water. Swimming Pool Kit - Chlorine, pH Increaser/Reducer, & Algaecide. Easy Colour Match System - Dip the water quality testing strip fully into the water, remove and hold horizontally then read against the coloured chart on the side of the bottle in 30 seconds.

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