The Unit Dose Vial Phenol Red Reagent is designed to measure pH levels in pool and spa water. These vials provide quick results and accurate readings, simplifying the process for maintaining proper water chemistry. Their precise formulation ensures that users can easily assess water quality and make informed adjustments as needed, contributing to a cleaner and healthier swimming environment. Ideal for both professionals and DIY pool owners, these vials make pH testing straightforward and efficient. Each case contains 100 unit dose vials that are compatible with visual testing methods, ensuring a sufficient supply for regular testing.