Hard water is not good for your spa.
As well as uncomfortable scale on the wall of your tub, white calcium marks on your jets, & limescale build up in your filter it also damages the internals of your spa, especially the heater.
Eventually limescale will become present in the tub itself in the form of "calcium flakes"
Using chemicals to counteract this process can be expensive and time consuming so use the Pure-Stream when filling your spa or pool to remove calcium and magnesium from the water replacing it with soft sodium instead.
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