Dellonda 3-in-1 Chlorine, PH & Alkalinity Test Strips - DL32

Dellonda 3-in-1 Chlorine PH & Alkalinity Test Strips - Pack of 50Perfect for checking the water quality of Hot Tubs Swimming Pools Ponds and Spas. Easy-to-use colour match system simply dip the water quality testing strip fully into the water remove and hold horizontally then read against the c...