{"product_id":"pentair-32-oz-cyanuric-acid-reagent-r161616","title":"Pentair 32 oz Cyanuric Acid Reagent R161616","description":"\u003ch2\u003ePentair Rainbow Cyanuric Acid Testing Reagent, 32 oz | R161616\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePentair R161616 Cyanuric Acid Testing Reagent\u003c\/strong\u003e is a genuine Pentair replacement reagent designed for measuring cyanuric acid (CYA), also known as chlorine stabilizer or conditioner, in swimming pool and spa water. Supplied in a convenient 32-ounce bottle, this testing solution is ideal for pool service professionals, commercial facilities, and residential pool owners who regularly monitor water chemistry.\u003c\/p\u003e\n\n\u003cp\u003eCyanuric acid helps protect chlorine from degradation caused by the sun's ultraviolet (UV) rays. Proper testing of CYA levels is essential for maintaining effective chlorine sanitation and preventing excessive stabilizer buildup. Pentair R161616 allows users to monitor stabilizer concentrations using compatible Pentair Rainbow water testing equipment.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenuine Pentair OEM Reagent:\u003c\/strong\u003e Manufactured for use with compatible Pentair Rainbow cyanuric acid testing procedures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasures Cyanuric Acid:\u003c\/strong\u003e Helps determine chlorine stabilizer concentrations in pool and spa water.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e32-Ounce Bottle:\u003c\/strong\u003e Convenient larger-volume container suitable for frequent water testing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupports Proper Water Balance:\u003c\/strong\u003e Helps pool owners maintain appropriate stabilizer levels for effective chlorine protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional and Residential Use:\u003c\/strong\u003e Suitable for pool service technicians, commercial maintenance teams, and homeowners.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Reagent Replacement:\u003c\/strong\u003e Replenishes the testing solution used in compatible water testing kits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Pentair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pentair Rainbow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e R161616\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePool360 Product Number:\u003c\/strong\u003e RAI-45-904\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Cyanuric Acid Testing Reagent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer Size:\u003c\/strong\u003e 32 fl oz (1 Quart \/ 946 mL)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Swimming Pools and Spas\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Liquid Reagent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 788379004026\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One 32 oz Bottle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Test Cyanuric Acid?\u003c\/h3\u003e\n\u003cp\u003eCyanuric acid acts as a stabilizer that reduces chlorine loss caused by sunlight. While maintaining sufficient CYA helps extend chlorine effectiveness in outdoor pools, excessive concentrations can reduce chlorine's sanitizing efficiency.\u003c\/p\u003e\n\n\u003cp\u003eRegular cyanuric acid testing is particularly important after adding pool stabilizer, draining or refilling pool water, or making significant adjustments to pool chemistry.\u003c\/p\u003e\n\n\u003ch3\u003eUsage Instructions\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eCollect a pool or spa water sample according to the instructions supplied with your compatible testing kit.\u003c\/li\u003e\n  \u003cli\u003eAdd the specified amount of Pentair R161616 Cyanuric Acid Reagent.\u003c\/li\u003e\n  \u003cli\u003eMix the sample as directed by the testing kit manufacturer.\u003c\/li\u003e\n  \u003cli\u003eComplete the cyanuric acid measurement procedure using the appropriate testing equipment.\u003c\/li\u003e\n  \u003cli\u003eCompare the result with the recommended stabilizer concentration for your pool and sanitizer system.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This product is a testing reagent and is not intended to be added directly to pool or spa water as a chemical treatment. Follow the instructions provided with your compatible Pentair testing kit.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Pool Water Testing Products\u003c\/h3\u003e\n\u003cp\u003eExplore additional water testing solutions available at Aqua Pool Supply:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/aquapoolsupply.com\/products\/taylorcyanuricacidreagent32ouncer0013ftayr0013f\"\u003eTaylor Cyanuric Acid Reagent, 32 oz | R-0013-F\u003c\/a\u003e – Alternative CYA testing reagent for compatible Taylor test kits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/aquapoolsupply.com\/products\/taylorcyanuricacidreagent16ozr0013etayr0013e\"\u003eTaylor Cyanuric Acid Reagent, 16 oz | R-0013-E\u003c\/a\u003e – Smaller reagent bottle for compatible Taylor testing equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/aquapoolsupply.com\/collections\/replacement-test-reagents\"\u003eReplacement Pool \u0026amp; Spa Test Reagents\u003c\/a\u003e – Browse additional water chemistry testing reagents.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"https:\/\/aquapoolsupply.com\/collections\/pool-spa-test-strips\"\u003ePool \u0026amp; Spa Test Strips\u003c\/a\u003e – Shop water testing strips for routine pool and spa maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintain Accurate Pool Water Chemistry\u003c\/h3\u003e\n\u003cp\u003eWhether you're managing a residential swimming pool or servicing multiple commercial facilities, the \u003cstrong\u003ePentair Rainbow R161616 Cyanuric Acid Testing Reagent\u003c\/strong\u003e provides a convenient replacement solution for regularly monitoring stabilizer levels and maintaining proper pool water chemistry.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52796332769596,"sku":"R161616","price":24.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/Screenshot2026-11-11123706.png?v=1794425839","url":"https:\/\/aquapoolsupply.com\/products\/pentair-32-oz-cyanuric-acid-reagent-r161616","provider":"Aqua Pool Supply","version":"1.0","type":"link"}