{"product_id":"hth-spa-alkalinity-up-granular-1-25-lb-raises-total-alkalinity-fast-stabilizes-ph-for-clearer-water","title":"HTH Spa Alkalinity Up granular 1.25 lb — Raises total alkalinity fast, stabilizes pH for clearer water","description":"\u003cp\u003e\u003cstrong\u003eHTH Spa Alkalinity Up is a fast-acting treatment that raises total alkalinity in spa water to stabilize pH and protect surfaces and equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eLow alkalinity can cause rapid pH swings, corrosion, cloudy water and discomfort for bathers. HTH Spa Alkalinity Up (1.25 lbs) is a granular formula designed to quickly increase total alkalinity and help keep pH within the desired range for balanced, comfortable spa water. It’s compatible with bromine, chlorine and biguanide systems and works alongside routine testing and sanitizing to maintain a healthy hot tub environment.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use HTH Spa Alkalinity Up safely and effectively?\u003c\/h3\u003e\n\u003cp\u003eTest your water first using HTH Spa Test Strips. If total alkalinity is below 80 ppm, add the recommended dosage directly to circulating spa water, allow the pump to run, then retest after 1–3 hours; repeat until alkalinity reaches 80–120 ppm.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTest total alkalinity before treatment and every few days.\u003c\/li\u003e\n  \u003cli\u003eAdd granules slowly to circulating water; follow package dosage instructions.\u003c\/li\u003e\n  \u003cli\u003eRun circulation 1–3 hours, then retest and repeat if needed.\u003c\/li\u003e\n  \u003cli\u003eDo not overdosed; adjust with pH decreaser if pH rises too high.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this product affect my sanitizer or spa equipment?\u003c\/h3\u003e\n\u003cp\u003eHTH Spa Alkalinity Up is formulated to be compatible with common sanitizers and will not interfere with bromine, chlorine or biguanide systems when used as directed. By stabilizing alkalinity and limiting pH swings, it can help reduce stress on heaters, pumps and filters, extending component life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with chlorine, bromine and biguanide sanitizer regimes.\u003c\/li\u003e\n  \u003cli\u003eHelps prevent scale and corrosion caused by fluctuating pH.\u003c\/li\u003e\n  \u003cli\u003eSupports clearer water, easing filter workload and maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow quickly will I notice results after applying Alkalinity Up?\u003c\/h3\u003e\n\u003cp\u003eAlkalinity changes are typically measurable within a few hours of treatment once water has circulated. Most users see total alkalinity return to the target 80–120 ppm after one or two treatments, depending on the initial level and spa volume.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAllow 1–3 hours of circulation before retesting.\u003c\/li\u003e\n  \u003cli\u003eRepeat dosing if alkalinity remains below recommended range.\u003c\/li\u003e\n  \u003cli\u003eFollow up with regular testing twice weekly to maintain balance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: HTH Spa Alkalinity Up is aimed at hot tub and spa owners who test and maintain water chemistry themselves and want a reliable solution to raise total alkalinity and reduce pH instability. It’s suited for private spa owners, rental property managers, and service professionals using chlorine, bromine or biguanide sanitation who need a straightforward, effective alkalinity increaser to protect equipment, improve comfort and keep water clear.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much Alkalinity Up should I add to my spa?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Dosage varies by spa volume and current alkalinity; follow the on-package instructions and retest after 1–3 hours.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Alkalinity Up with bromine or chlorine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, HTH Spa Alkalinity Up is compatible with bromine, chlorine and biguanide sanitizers when used as directed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HTH","offers":[{"title":"Default Title","offer_id":54192833659064,"sku":"B09JZWWJTC","price":39.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0636\/7416\/files\/hth-alkalinity-up-front-label_3a426898-9af6-48c6-a796-899f05dde58c.jpg?v=1790552155","url":"https:\/\/canadianlawn.ca\/products\/hth-spa-alkalinity-up-granular-1-25-lb-raises-total-alkalinity-fast-stabilizes-ph-for-clearer-water","provider":"Canadian Lawn","version":"1.0","type":"link"}