Let me note that you want a certain level of calcium in your spa water for two reasons.
- Water “likes” to have other minerals dissolved in it hence, soft water is actually mildly corrosive. Over a long time, soft water will cause pitting in the metal components in your spa – obviously not something you want to see.
- Calcium in your water also helps to reduce foaming, so much so that spas with high levels of calcium (above 500 ppm) will rarely see foaming while spas with low calcium levels (under 50 ppm) will often see foaming.
Bottom line – You want around 150 – 250 ppm of calcium in your spa water. If your tap water is naturally “soft” (low in calcium), our Calcium Plus allows you to easily add calcium to your spa.
