For maintaining your pool or health spa’s water chemistry, Poolmaster’s replacement options are the best choice.
- For keeping proper water chemistry
- Includes 1/2oz. services of OTO and Phenol Red
- OTO tests for the Chlorine Level
- Phenol Red evaluates the pH level
- (Note: Phenol Red is not the exact same as Solution # 2 Phenol Red – DO NOT interchange)