Poolmaster 23227 Replacement Indicator Solutions #1 - #5 For maintaining proper water chemistry Tests for five chemical factors: Chlorine, Bromine, pH, Acid Demand, and Total Alkalinity Includes 1oz. solutions of #1-#3 and 1/2oz. solutions of #4 - #5 (Note: Solution #2 Phenol Red is not the same as Phenol Red - DO NOT interchange) Phenol Red is for use with 2 or 3-Way Test Kits Only - not to be used with 5-Way Test Kits