Swimming Pool & Spa Test Kit Refill Solutions, Test Water for pH, Chlorine and Bromine

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The 2 standard refill solutions for pool & spa chemical test kits 1/2 ounce dropper bottle of OTO (Orthotolidine) Chlorine Test Solution 1/2 ounce dropper bottle of Phenol Red pH T est Solution The 2 standard testing solutions that are used for measuring and maintaining the proper Chlorine, Bromine and pH chemical levels in swimming pools and spas 5 drops of each solution are typically mixed in a test tube block along with pool water to check the Chloride, Bromine and pH readings Show more