For maintaining proper water chemistry; Tests for Chlorine, Bromine, pH, Acid Demand, and Total Alkalinity | Includes clear-view round test block with integrated color chips for accurate color matching | Includes 1oz. solutions of #1-#3 and 1/2oz. solutions of #4 – #5; (Note: #2 Phenol Red is not the same as Phenol Red – DO NOT interchange) | #2 Phenol Red is for use with 5-Way Test Kits and Phenol Red is for use with 2 or 3-Way Test Kits | Note: The #1 solution is sealed to comply with transportation regulations. No other solutions in this kit require sealed caps.