- Description Waterco 4in1 Test Kit Tests for Chlorine/Bromine pH – Acid demand Total Alkalinity Waterco test kit provides a fast and accurate reading of your pool or spas water chemistry.Contains: Reagents solution 5 total alkalinity Reagent solution 4 chlorine neutralizer Reagent solution 3 acid demand and total alkalinity Reagent solution 2 pH test DPD1 tablets for chlorine reading Plus instructions on how to use the test kit. Suitable for Domestic and Commercial Pools for people who want to really know how to look after water quality