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Hot Tub Water Balance for Hot Spot Owners: pH, Alkalinity, and Calcium Hardness Made Simple Clear water is not the same as healthy water. Your Hot Spot spa can look sparkling while its chemistry quietly drifts out of range, and when that happens, sanitizer stops working efficiently, skin and eyes get irritated, and scale or corrosion starts building inside the heater and plumbing. The good news is that balancing hot tub water comes down to three measurements and a simple order of operations. Onc … read more