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With Leisure Time Free Sanitizer Spa & Hot Tub Test Strips you can now check the sanitizer level, calcium hardness, alkalinity, and pH with one easy-to-read test strip. An easy-to-read chart is included on the back of the bottle, so there is no guessing. The bottle is made with a patented Pop-Top that protects strips from moisture and UV light. These test strips are compatible with the Free Sanitizing System, and biguanide spas and hot tubs.
- Dip strip in water 1 time.
- Compare test results to chart on back of the bottle.