{"product_id":"total-hardness-liquid-reagents","title":"Total Hardness Liquid Reagents – Kit to Measure (50 Tests)","description":"\u003cp\u003e\u003cstrong\u003eTotal Hardness Liquid Reagents – Kit to Measure (50 Tests)\u003c\/strong\u003e are photometer-compatible \u003cstrong\u003ereplacement \/ refill\u003c\/strong\u003e consumable liquid reagents used for accurate \u003cstrong\u003epool \u0026amp; spa\u003c\/strong\u003e testing.\u003c\/p\u003e\n\u003ch2\u003eKey Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Replacement \/ refill reagent (consumable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest parameter:\u003c\/strong\u003e Total hardness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Liquid reagent kit (50 tests)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf life:\u003c\/strong\u003e 6 months (from the date you receive it)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat this reagent does\u003c\/h2\u003e\n\u003cp\u003eBasically dissolved salts belonging to the alkaline earth elements calcium and magnesium are found in non-distilled water. In rare cases, strontium and barium can also be found. These combine with carbonate ions to form water- insoluble compounds (calcium). Through the total hardness measurement, the potential danger of calcium precipitation is measured as the required carbonate ions form from hydrogen carbonate ions when water heats up or when there are pH values that are greater than 8.2 (comp. Alkalinity). When measuring calcium hardness (SVZ1300 tablet process), only the part of the dissolved calcium in water is measured. The amount of magnesium dissolved in water is determined from the difference between the measurement and the total hardness.\u003c\/p\u003e\n\u003ch2\u003eStorage \u0026amp; shelf life\u003c\/h2\u003e\n\u003cp\u003eStore reagents \u003cstrong\u003ecool, dry, and sealed\u003c\/strong\u003e. Avoid humidity and heat.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended storage temperature:\u003c\/strong\u003e 59-77°F (15-25°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect from:\u003c\/strong\u003e moisture\/water and direct heat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProper storage helps maintain accuracy and supports the stated shelf life.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0549\/9525\/5479\/files\/Total_Hardness_Photometer_-_TBSPTH_-_GB_-_en.pdf?v=1769802129\" rel=\"noopener\" target=\"_blank\"\u003eMaterial Safety Data Sheet (MSDS) — Download\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Product performance depends on correct testing procedure and proper reagent storage.\u003c\/p\u003e","brand":"PoolWaterLAB","offers":[{"title":"Default Title","offer_id":40014087061687,"sku":"POL2010TH12","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/9525\/5479\/files\/total-hardness-liquid-reagents-two-bottles-poolwaterlab.jpg?v=1770221481","url":"https:\/\/www.poolwaterlab.us\/products\/total-hardness-liquid-reagents","provider":"PoolWaterLAB","version":"1.0","type":"link"}