{"product_id":"calstop-calcium-reducer-1-9l","title":"Calstop New Concentrated Formula 1.9 L - Calcium Reducer","description":"\u003cp\u003e\u003cstrong\u003eCalstop New Concentrated Formula (1.9L)\u003c\/strong\u003e is Australia's leading calcium scale inhibitor for salt and freshwater pools. The new concentrated formula replaces the old 5L bottle and treats pools up to 50,000 litres, lasting up to six months per dose.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHolds calcium in suspension up to 1,000ppm — prevents scale formation\u003c\/li\u003e\n\u003cli\u003eLasts up to six months per treatment\u003c\/li\u003e\n\u003cli\u003eSoftens calcium scale in salt cells, making them easier to clean\u003c\/li\u003e\n\u003cli\u003eRecommended for all pool surfaces — concrete, pebblecrete, Quartzon, fibreglass, vinyl\u003c\/li\u003e\n\u003cli\u003eIdeal for new pools during the critical 4-week start-up period\u003c\/li\u003e\n\u003cli\u003eTreats pools between 40,000 and 50,000 litres per 1.9L bottle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow Calstop Works\u003c\/h2\u003e\n\u003cp\u003eCalcium is a naturally occurring mineral that can cause scaling and cloudiness when levels exceed 400ppm. Calstop keeps dissolved calcium in liquid form, preventing it from solidifying and scaling on pool surfaces, salt cells, and equipment. It is a \u003cstrong\u003epreventative treatment\u003c\/strong\u003e — it does not remove existing calcium scale.\u003c\/p\u003e\n\n\u003ch2\u003eNew Pool Start-Up Guidance\u003c\/h2\u003e\n\u003cp\u003eNew pools with rendered finishes are most vulnerable to calcium build-up in the first four weeks after filling. Add Calstop as soon as the pool is filled. Key reminders during start-up:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDo not adjust calcium hardness (CH) until after 4 weeks\u003c\/li\u003e\n\u003cli\u003eMonitor and maintain pH below 8.0 daily in week 1, then every 2–4 days through weeks 2–4\u003c\/li\u003e\n\u003cli\u003eTest total alkalinity weekly and keep above 100ppm\u003c\/li\u003e\n\u003cli\u003eDo not add salt within the first 4 weeks — use stabilised liquid chlorine instead\u003c\/li\u003e\n\u003cli\u003eBrush walls and floor daily with a nylon brush to remove residue\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDownloads\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1218\/7656\/files\/MSDS_Quartzon_Calstop_0515.pdf?3994545943860679217\" title=\"Calstop MSDS Data Sheet\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCalstop — MSDS Safety Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BWT","offers":[{"title":"Default Title","offer_id":45288699789587,"sku":"A86","price":76.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/0591\/1827\/products\/Calstop.jpg?v=1684893589","url":"https:\/\/poolshop.com.au\/products\/calstop-calcium-reducer-1-9l","provider":"Pool Shop Australia","version":"1.0","type":"link"}