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 to use the Pure-Stream when filling your spa or pool to remove calcium and magnesium from the water replacing it with soft sodium instead.
Simply attach your garden hose to the filter & fill your spa using a slow to medium flow rate.
The slower the fill the more effective the process.
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