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Calcium Hardness Increaser by EcoOne | Spa Total Hardness Increaser Made of Calcium Chloride | Helps Prevent Spa Corrosion, Etching & Staining | Chlorine-Free Hot Tub Hardness Increaser, 28 Oz
4.8 (72 items)
Limited Time SaleUntil the end
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US$13.79 cheaper than the new price!!
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Free cash-on-delivery fees for purchases over $99
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Used US$9.20
Product details
| Management number | 216928643 | Release Date | 2026/04/19 | List Price | US$9.20 | Model Number | 216928643 | ||
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- RAISE YOUR SPA’S CALCIUM HARDNESS - EcoOne Calcium Hardness Increaser is made of pure calcium chloride, a granular powder designed to gently raise your spa or hot tub water hardness for balanced water chemistry.
- SKIN-FRIENDLY FORMULA - Our natural hot tub hardness increaser is safe for both skin and eyes as it contains no harsh additives and is 100% free of chlorine, phosphates, and other irritants. This calcium increaser also improves comfort by making the water feel smoother and more pleasant!
- PREVENTS DAMAGE TO YOUR SPA - Calcium hardness is important because it prevents equipment corrosion, etching, and staining caused by low water hardness levels. Use EcoOne total hardness increaser to keep your spa’s plumbing, heating, and filtration systems in tip-top shape!
- HOW TO USE CALCIUM HARDNESS INCREASER - With pumps running and water circulating, test total hardness. If less than 250 ppm, add one ounce (two tablespoons) of EcoOne Calcium Hardness Increaser to increase calcium hardness by 10 ppm for every 500 gallons of water. Circulate water for several hours and retest. Repeat until total hardness is within correct range.
- ABOUT THE BRAND - EcoOne spa chemicals include chlorinating tablets, water balancers, and our total hardness increaser for a full line of earth-friendly spa care products that work together synergistically. Designed to keep your spa clean, sparkling, and safe for everyone—even those with sensitive skin.
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