Check the listing for details. Sirona Simply Test Strips (25 per bottle) (2 Pack). Condition: New. Listed at 39.98 USD. Sirona Simply - Test Strips (25 Strips) - 2 PackPart #82120/2Product DetailsThis Sirona Multipack Includes: 2 BottlesSirona Spa Care Simply Test Strips - 2 PackThe 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. Returns are not accepted on opened or used products and are subject to a 10% restocking fee unless return is covered under warranty. An RMA/RGA is required to return all products Buyer pays all return shipping if item is not covered by warranty If you have any questions, please feel free to contact Clearview Fireplace and Patio We would be happy to help