{"product_id":"glb-calcium-hypochlorite-pool-shock-1-lb-packets-24-pack-73-fast-acting-no-cyanuric-acid","title":"GLB Calcium Hypochlorite Pool Shock 1 lb Packets, 24-Pack — 73% Fast-Acting, No Cyanuric Acid","description":"\u003cp\u003e\u003cstrong\u003eGLB SuperSonic Calcium Hypochlorite Pool Shock is a fast-acting, multi-purpose pool treatment sold as 1-pound packets in a 24-count pack for sanitizing, clarifying, algae prevention and shock treating without adding cyanuric acid.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for routine pool maintenance and periodic shock treatments, this product delivers concentrated available chlorine in a granular form that dissolves cleanly and leaves no residue on pool surfaces. With a 73% calcium hypochlorite formulation, each single-pound packet offers measured convenience for hobbyist and pro-level pool care. It’s formulated to work on all pool surfaces and won’t over-stabilize your water, making it a versatile option for both weekly sanitation and emergency algae control.\u003c\/p\u003e\n\n\u003ch3\u003eHow much should I use to shock my pool?\u003c\/h3\u003e\n\u003cp\u003eDosage depends on your pool volume and the desired chlorine increase. GLB recommends 9 to 18 ounces of product per 10,000 gallons of water to raise free chlorine by roughly 5 to 10 ppm; use higher amounts for heavier contamination.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical dose: 9–18 ounces per 10,000 gallons for 5–10 ppm available chlorine\u003c\/li\u003e\n  \u003cli\u003eOne 1-lb packet is convenient for partial dosing or smaller pools\u003c\/li\u003e\n  \u003cli\u003eAdjust based on test kit readings and water condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this product change my pool’s pH or alkalinity?\u003c\/h3\u003e\n\u003cp\u003eCalcium hypochlorite can affect water chemistry, so monitor levels after treatment. Aim to keep pH between 7.2 and 7.6 and total alkalinity in the 60–120 ppm window for balanced water and optimal sanitizer performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTarget pH: 7.2–7.6 for swimmer comfort and chlorine efficiency\u003c\/li\u003e\n  \u003cli\u003eTarget total alkalinity: 60–120 ppm to stabilize pH swings\u003c\/li\u003e\n  \u003cli\u003eRetest after shocking and adjust with pH\/alkalinity products if needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it safe for all pool surfaces and does it leave residue?\u003c\/h3\u003e\n\u003cp\u003eGLB SuperSonic is formulated to work on vinyl, fiberglass, plaster and concrete surfaces. The fast-dissolving granules are designed to leave minimal residue when applied according to directions, though proper dilution and circulation are important.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuitable for vinyl, fiberglass, plaster, concrete pools\u003c\/li\u003e\n  \u003cli\u003eFast-acting granules that dissolve cleanly when used correctly\u003c\/li\u003e\n  \u003cli\u003eRun the pump and brush if needed to disperse and eliminate deposits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this product fit into a regular maintenance routine?\u003c\/h3\u003e\n\u003cp\u003eUse GLB SuperSonic for weekly sanitizing boosts, after heavy bather load, or when addressing mild to moderate algae or cloudy water. Because it contains no cyanuric acid, it’s a good option when you want to raise chlorine quickly without increasing stabilizer levels.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWeekly or as-needed shock treatment to maintain sanitizer levels\u003c\/li\u003e\n  \u003cli\u003ePost-storm or post-party shock to clear contaminants and organic load\u003c\/li\u003e\n  \u003cli\u003eNo cyanuric acid — avoids extra stabilizer buildup over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: GLB SuperSonic Calcium Hypochlorite Pool Shock is suited to homeowners, pool service technicians, and property managers who want a reliable, concentrated oxidizer in convenient one-pound packets. It works well for both routine maintenance and periodic shock treatments in residential and commercial pools, especially where fast chlorine increases and minimal stabilizer addition are desired. Always follow the product label for safe handling, correct dosing, and post-treatment testing before allowing swimmers back into the water.\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: Can I use GLB SuperSonic in all pool types?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s formulated for vinyl, fiberglass, plaster and concrete pools when used as directed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this product contain cyanuric acid?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. GLB SuperSonic does not contain cyanuric acid, so it won’t increase stabilizer levels.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GLB","offers":[{"title":"Default Title","offer_id":56806036799828,"sku":"B00WLWMMAQ","price":266.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/glb-front-packaging-1lb-24pack.jpg?v=1786812211","url":"https:\/\/gardenluxe.co.uk\/products\/glb-calcium-hypochlorite-pool-shock-1-lb-packets-24-pack-73-fast-acting-no-cyanuric-acid","provider":"Gardenluxe Uk","version":"1.0","type":"link"}