{"product_id":"frog-calcium-hardness-increaser-for-hot-tubs-swim-spas-2-pack-2-lb-with-trudose-measuring-cap-fast-dissolving","title":"FROG Calcium Hardness Increaser for Hot Tubs \u0026 Swim Spas — 2-Pack (2 lb) with TruDose Measuring Cap, Fast-Dissolving","description":"\u003cp\u003e\u003cstrong\u003eFROG Soothe Calcium Total Hardness Increaser is a fast-dissolving powder that raises and stabilizes calcium hardness in hot tubs and swim spas to protect surfaces and equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeeping calcium hardness in the recommended range prevents etching, corrosion and staining while helping water chemistry stay balanced with fewer surprises. This 2-pack of 2 lb bottles includes the TruDose measuring cap for accurate, spill-free dosing and step-by-step guidance so owners can correct low hardness without complicated calculations. FROG Soothe works with any sanitizing system — chlorine, bromine or salt — and dissolves quickly for reliable results.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know when to use FROG Soothe in my hot tub or swim spa?\u003c\/h3\u003e\n\n\u003cp\u003eTest your water with a FROG test strip or any standard hardness test; if total hardness reads below the manufacturer’s recommended range, add this product to raise it. Low calcium hardness can cause metal corrosion and surface damage, so periodic checks are part of routine maintenance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse test strips weekly or after heavy usage to monitor hardness.\u003c\/li\u003e\n  \u003cli\u003eAdd according to the dosing chart on the bottle or TruDose cap readings.\u003c\/li\u003e\n  \u003cli\u003eRetest after circulation for 4–24 hours to confirm target hardness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I measure and add the correct amount safely?\u003c\/h3\u003e\n\n\u003cp\u003eThe FROG TruDose measuring cap eliminates guesswork: its translucent cup shows standard tablespoon and cup marks and seals to prevent spills during storage. Follow the bottle instructions for your tub volume and sanitizer type, dissolve as directed if needed, and circulate water until fully mixed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse the TruDose cap to scoop and pour measured doses precisely.\u003c\/li\u003e\n  \u003cli\u003eFor larger jumps, add in increments and retest between additions.\u003c\/li\u003e\n  \u003cli\u003eKeep the cap sealed to avoid moisture and maintain accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill FROG Soothe work with my chlorine, bromine or salt system?\u003c\/h3\u003e\n\n\u003cp\u003eYes — FROG Soothe is compatible with all common hot tub and swim spa sanitizers, so it integrates into existing water care routines without requiring sanitizer changes. The formula focuses on raising calcium hardness and does not interfere with normal sanitizer action when used as directed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSafe for use with chlorine, bromine, and salt systems.\u003c\/li\u003e\n  \u003cli\u003eFollow standard safety and circulation instructions after dosing.\u003c\/li\u003e\n  \u003cli\u003ePair with regular sanitizer and pH testing for best overall balance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat results should I expect after using this product?\u003c\/h3\u003e\n\n\u003cp\u003eAfter proper dosing and circulation, calcium hardness should rise to the recommended range, reducing the risk of scaling or surface corrosion and contributing to a more stable water balance. Maintain routine testing to preserve target levels, especially after draining or heavy refilling.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVisible protection of metal fittings and surface finishes over time.\u003c\/li\u003e\n  \u003cli\u003eFaster dissolving action means quicker return to normal use.\u003c\/li\u003e\n  \u003cli\u003eTruDose cap helps reduce overdosing and spills for cleaner maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: FROG Soothe Calcium Total Hardness Increaser is aimed at hot tub and swim spa owners who want an easy, accurate way to correct low calcium hardness without complicated math. It suits first-time tub owners and experienced maintainers alike, especially those using chlorine, bromine or salt sanitation and anyone who values protected equipment, longer-lasting surfaces and simpler weekly water care. The 2 lb bottle size and included TruDose cap offer convenient, measurable dosing; the 2-pack is useful for multiple tubs, seasonal maintenance, or keeping a backup supply on hand.\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 quickly does FROG Soothe dissolve?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: FROG Soothe is fast-dissolving; circulate water for 4–24 hours and retest hardness to confirm results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this with a saltwater hot tub?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. FROG Soothe is compatible with chlorine, bromine and salt systems when used as directed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FROG","offers":[{"title":"Default Title","offer_id":56831405916500,"sku":"B0FLRGFST1","price":66.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/frog-soothe-front-label.jpg?v=1787015466","url":"https:\/\/gardenluxe.co.uk\/products\/frog-calcium-hardness-increaser-for-hot-tubs-swim-spas-2-pack-2-lb-with-trudose-measuring-cap-fast-dissolving","provider":"Gardenluxe Uk","version":"1.0","type":"link"}