{"product_id":"r-0012-a-taylor-hardness-reagent-0-75-oz","title":"R-0012-A | Taylor Hardness Reagent | 0.75 oz.","description":"\u003cp data-start=\"94\" data-end=\"647\"\u003eThe Taylor R-0012-A Hardness Reagent (0.75 oz) is a precision-formulated drop-bottle used in compatible Taylor pool and spa test kits to measure calcium hardness levels. Designed to work in conjunction with reagents R-0010 and R-0011L, this reagent triggers the final color change step, allowing you to calculate water hardness accurately. Proper hardness testing protects pool surfaces, equipment and water balance—ensuring safer, clearer water and helping you avoid corrosion or scaling issues.\u003c\/p\u003e\n\u003ch3 data-start=\"649\" data-end=\"665\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-start=\"666\" data-end=\"1529\"\u003e\n\u003cli data-start=\"666\" data-end=\"829\"\u003e\n\u003cp data-start=\"668\" data-end=\"829\"\u003e\u003cstrong data-start=\"668\" data-end=\"698\"\u003eAccurate Hardness Testing:\u003c\/strong\u003e Enables reliable measurement of calcium hardness when used with Taylor test kits, helping safeguard pool surfaces and equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"830\" data-end=\"1016\"\u003e\n\u003cp data-start=\"832\" data-end=\"1016\"\u003e\u003cstrong data-start=\"832\" data-end=\"859\"\u003e0.75 oz Dropper Format:\u003c\/strong\u003e Compact size ideal for refills, ensuring you have the correct volume for your testing routine without over-stocking. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.poolgeek.com\/products\/taylor-r-0012-hardness-reagent?srsltid=AfmBOorSAXJ1fmQLa94XxABA_MlPPBKZ8wIN34JBhhkpKzWL3gX8apLa\u0026amp;utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.poolgeek.com\/products\/taylor-r-0012-hardness-reagent?srsltid=AfmBOorSAXJ1fmQLa94XxABA_MlPPBKZ8wIN34JBhhkpKzWL3gX8apLa\u0026amp;utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-[15ch] grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"830\" data-end=\"1016\"\u003e\n\u003cp data-start=\"832\" data-end=\"1016\"\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003ca href=\"https:\/\/www.poolgeek.com\/products\/taylor-r-0012-hardness-reagent?srsltid=AfmBOorSAXJ1fmQLa94XxABA_MlPPBKZ8wIN34JBhhkpKzWL3gX8apLa\u0026amp;utm_source=chatgpt.com\" rel=\"noopener\" alt=\"https:\/\/www.poolgeek.com\/products\/taylor-r-0012-hardness-reagent?srsltid=AfmBOorSAXJ1fmQLa94XxABA_MlPPBKZ8wIN34JBhhkpKzWL3gX8apLa\u0026amp;utm_source=chatgpt.com\" class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" target=\"_blank\"\u003e\u003cspan class=\"relative start-0 bottom-0 flex h-full w-full items-center\"\u003e\u003cspan class=\"flex h-4 w-full items-center justify-between\"\u003e\u003cspan class=\"max-w-[15ch] grow truncate overflow-hidden text-center\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cstrong data-start=\"1019\" data-end=\"1041\"\u003eKit Compatibility:\u003c\/strong\u003e Designed specifically to replace reagent R-0012 in Taylor’s hardness testing system and integrates seamlessly with the established test protocol.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1355\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1355\"\u003e\u003cstrong data-start=\"1192\" data-end=\"1220\"\u003eProtects Pool Integrity:\u003c\/strong\u003e By accurately measuring hardness, you can prevent scaling, corrosion, and maintain proper water chemistry for longer equipment life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1356\" data-end=\"1529\"\u003e\n\u003cp data-start=\"1358\" data-end=\"1529\"\u003e\u003cstrong data-start=\"1358\" data-end=\"1385\"\u003eAnnual Maintenance Tip:\u003c\/strong\u003e Taylor recommends replacing reagents each year to maintain accuracy and minimize drift in test results.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"34\" data-end=\"56\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"57\" data-end=\"371\"\u003eIf you’re restocking your Taylor water test kit, the Taylor R-0012-A Hardness Reagent (0.75 oz) is the small but vital component that measures calcium hardness. This section explains how to confirm compatibility, understand how it interacts with R-0010 and R-0011L, and ensure proper use before you buy in store.\u003c\/p\u003e\n\u003ch2 data-start=\"373\" data-end=\"427\"\u003eHow the Taylor R-0012-A Works in Hardness Testing\u003c\/h2\u003e\n\u003cp data-start=\"428\" data-end=\"641\"\u003eThis reagent is the final titrant step in the calcium hardness test. When used with Taylor reagents R-0010 and R-0011L, it produces a clear color change that reveals the hardness level in your pool or spa water.\u003c\/p\u003e\n\u003ch4 data-start=\"642\" data-end=\"714\"\u003eHow many drops of R-0012-A are needed to complete a hardness test\u003c\/h4\u003e\n\u003ch4 data-start=\"715\" data-end=\"788\"\u003eCan I buy the R-0012-A reagent in store for same-day water testing\u003c\/h4\u003e\n\u003ch4 data-start=\"789\" data-end=\"875\"\u003eDoes this reagent work with my existing Taylor kit that uses R-0010 and R-0011L\u003c\/h4\u003e\n\u003ch4 data-start=\"876\" data-end=\"951\"\u003eWhat color change should I expect when the hardness test is complete\u003c\/h4\u003e\n\u003ch4 data-start=\"952\" data-end=\"1031\"\u003eCan I bring my Taylor kit to the store to match the correct reagent size\u003c\/h4\u003e\n\u003ch2 data-start=\"1033\" data-end=\"1070\"\u003eProper Handling and Storage Tips\u003c\/h2\u003e\n\u003cp data-start=\"1071\" data-end=\"1281\"\u003eEven though it’s a small bottle, R-0012-A should be kept upright in a cool, shaded location. Reagents lose accuracy if exposed to heat or direct sunlight, so store it with your test kit in a clean, dry place.\u003c\/p\u003e\n\u003ch4 data-start=\"1282\" data-end=\"1364\"\u003eHow long does a 0.75 oz bottle of R-0012-A last during regular pool testing\u003c\/h4\u003e\n\u003ch4 data-start=\"1365\" data-end=\"1437\"\u003eWhat’s the best temperature range to store Taylor reagents safely\u003c\/h4\u003e\n\u003ch4 data-start=\"1438\" data-end=\"1511\"\u003eIs it safe to store R-0012-A near chlorine tablets or acid bottles\u003c\/h4\u003e\n\u003ch4 data-start=\"1512\" data-end=\"1590\"\u003eHow to handle accidental contact or spills while testing water hardness\u003c\/h4\u003e\n\u003ch4 data-start=\"1591\" data-end=\"1672\"\u003eDoes Discount Pool Mart carry protective accessories for handling reagents\u003c\/h4\u003e\n\u003ch2 data-start=\"1674\" data-end=\"1711\"\u003eImproving Water Balance Accuracy\u003c\/h2\u003e\n\u003cp data-start=\"1712\" data-end=\"1906\"\u003eAccurate calcium hardness readings help prevent damage to plaster, heaters, and metal fittings. Testing regularly ensures proper balance, clearer water, and long-lasting equipment performance.\u003c\/p\u003e\n\u003ch4 data-start=\"1907\" data-end=\"1985\"\u003eHow often should I test calcium hardness in a standard residential pool\u003c\/h4\u003e\n\u003ch4 data-start=\"1986\" data-end=\"2060\"\u003eHow to adjust water hardness levels based on my Taylor test results\u003c\/h4\u003e\n\u003ch4 data-start=\"2061\" data-end=\"2149\"\u003eCan I purchase all three reagents R-0010, R-0011L, and R-0012-A in store together\u003c\/h4\u003e\n\u003ch4 data-start=\"2150\" data-end=\"2223\"\u003eWhat hardness range should I maintain to protect tile and surfaces\u003c\/h4\u003e\n\u003ch4 data-start=\"2224\" data-end=\"2291\"\u003eHow to interpret the color change endpoint for best accuracy\u003c\/h4\u003e","brand":"Taylor Technologies","offers":[{"title":"Default Title","offer_id":50914807939360,"sku":"R-0012-A","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/R-0012-ATaylorHardnessReagent0.75oz.DiscountPoolMart.jpg?v=1766079354","url":"https:\/\/discountpoolmart.com\/products\/r-0012-a-taylor-hardness-reagent-0-75-oz","provider":"Discount Pool Mart","version":"1.0","type":"link"}