The InstaTest Free Chlorine & pH Test Kit is designed to measure both free chlorine and pH levels in pool and spa water. It accurately measures free chlorine levels from 0.5 to 10 ppm and pH levels from 6.8 to 8.2, ensuring effective water chemistry management. Each kit includes 30 Free Chlorine (DPD) TesTabs, 30 pH TesTabs, and a DipCell comparator, all housed in a sturdy case with trilingual instructions (English, Spanish, French). The kit provides precise measurements, is user-friendly, and offers consistent reliability for pool and spa maintenance.