If hard water is not dealt with properly, it can lead to the formation of scale on hot tub surfaces and cause damage to the equipment. Scale forms fast in hot tubs because the hot water environment cause calcium to become a solid and drop out of solution. The calcium combines quickly with carbonates to form tough, damaging scale. In hard-water areas, the use of a stain-and-scale control additive is recommended at least once per week.

BALANCE THE WATER
Balanced water is critical in a hot tub, and two main adjustments (total alkalinity and pH) will need to be made.

Total Alkalinity - this creates a buffer in the water so it can resist any acids that may be added to the water. This is the first and most important adjustment to be made. Total alkalinity acts as a control to the pH. The pH cannot be properly adjusted if the total alkalinity is out of the suggested ranges. The recommended total alkalinity range in a hot tub is 120-150ppm.
pH - this is a measurement of the acids or bases in the water. A low pH indicates the water is primarily acidic. A high pH means the water is more base or alkaline. Ideally, we aim for a pH of 7.5ppm which

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