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6-in-1 pool test strips: These pool test kits measure various parameters, including total alkalinity, pH, free chlorine, total hardness, cyanuric acid and total chlorine. Easy to read: Immerse the pool test strip in water for 2 seconds, then take it out, hold it horizontally for about 60 seconds, compare it with the colour chart, the result can be easily and quickly read within 60 seconds. High precision results: These water test strips have been specially developed for water, which can provide instant and reliable results in no time at all. Clean and healthy: Use pool test strips twice a week at both ends of the pool to achieve better results and let you know if your pool water is healthy and clean. Widely used: spa test strips for hot tubs are suitable for detecting swimming pools, aquariums, sewage, tap water, drinking water and other different water qualities. › See more product details