UK 50* 3 in 1 Chlorine Dip Test Strips Hot Tub Swimming Papers Pool Tester PH
50pcs 3-in-1 Water Tester Paper Residual Chlorine PH Value Alkalinity Test Strip High Precision Easy Detection Pool Accessories. Residual chlorine: 0-10/22ppm. PH: 6.8~8.4ph.