Description Pentair Rainbow Pool Water ph Test Kit Solution Phenol Red will have a yellow color at a pH of 6.4 & red color at a pH of 8.2. For the management of swimming pools water, pH Phenol Red Test Kit Solution reagents are used to test a pool’s pH levels. Which can help monitor and maintain an acceptable pH range in the pool water. It produces characteristic colour changes when dissolved in the water sample. The pH value is important for the disinfection effect of water care products. Changing from yellow to red over pH 6.6 to 8.0, and then turning a bright pink color above pH 8.1. Phenol red serves as a pH indicator dye. Show More Show Less
