Clorox Pool&Spa® Spa Test Strips are a 5-Way Tester. These strips test your spa water s total hardness total chlorine or total bromine chlorine pH and total alkalinity water parameter to help you keep your spa balanced. Test manually with the level indicators shown on the spa test strip bottle. Test regularly to maintain a pH balance of 7.2-7.6 and 3-6 ppm of bromine or 3-5 ppm free chlorine. Drain clean and refill your spa every 90 days. There are 30 individual Test Strips available in this package. 0.2lbs. Use this product to identify other Clorox Pool&Spa® Balancers to complete your healthy Spa experience.