Is your pool safe to swim in? Is your swimming pool sanitized? Do you need more chlorine or acid? These easy-to-use Pool and Spa Test Strips will answer those questions in seconds! Using these test strips helps eliminate the guesswork in your pool's water chemistry. Test for chlorine, bromine, PH, alkalinity, and total hardness. The Salt test strips test salt levels from 400-7000 ppm. This 50-strip package comes with complete instructions. Keep your pool or spa water crystal clear. Use the Pool and Spa Test Strips from ToySplash for peace of mind when it comes to pool and spa chemical levels.