Check the listing for details. Sirona Spa Care Simply Test Strips. Condition: New. Listed at 21.99 USD. The Sirona Spa Care Simply Test Strips provide a fast and straightforward method to test your spa or hot tub treated with Sirona Spa Care Simply products. Each strip measures Sirona Simply Sanitizer, Calcium Hardness, Total Alkalinity, and pH levels.Product Features:Test Strips are compatible with biguanide sanitizersEasily tests spa water in biguanide systems, so you can solve spa water problems and relax25 one-dip test strips give quick, accurate results for clear, soothing spa waterRecommended levels: pH 7.2-7.8, total alkalinity 80-120 ppm and calcium hardness 150-400 ppmSirona Simply. The bromine-free, chlorine-free biguanide solution.Directions:Immerse strip for 2 seconds.Remove with pads face up.Shake ONCE to remove excess water.Wait 10 seconds and compare to color chart.The Sirona Spa Care Simply Test Strips provide a fast and straightforward method to test your spa or hot tub treated with Sirona Spa Care Simply products. Each strip measures Sirona Simply Sanitizer, Calcium Hardness, Total Alkalinity, and pH levels.Product Features:Test Strips are compatible with biguanide sanitizersEasily tests spa water in biguanide systems, so you can solve spa water problems and relax25 one-dip test strips give quick, accurate results for clear, soothing spa waterRecommended levels: pH 7.2-7.8, total alkalinity 80-120 ppm and calcium hardness 150-400 ppmSirona Simply. The bromine-free, chlorine-free biguanide solution.Directions:Immerse strip for 2 seconds.Remove with pads face up.Shake ONCE to remove excess water.Wait 10 seconds and compare to color chart.