Lovibond Rapid Refill Pack for Chlorine/pH; DPD No 1 & Phenol Red Rapid (30 Tablets/3 Strips each)
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Includes 30x DPD No.1 and 30x Phenol Red Tablets.
Both to be used with a testing kit, DPD No 1 Testing Tablets test the residual chlorine level in your pool water. The Phenol Red Testing Tablets are used to test the pH level in your pool water.