Nordic does not recommend using soft water in your hot tub or spa.
If you have hard water or well water we recommend using a filter that attached to the end of the hose.
If you have very hard water, it is recommended to use Metal Gone.
Soft water tends to be low in calcium and hard water tends to be high. This can disrupt the effectiveness of the chemical balance of the water.
- You should check the calcium level every time you add water to the spa and adjust as needed.
- The recommended calcium hardness level for a hot tub is between 100 -200mg/l.
- Low calcium can cause corrosion.
- High calcium can cause cloudy water, and calcium deposits throughout the tub.