How to Raise Hardness in Your Hot Tub: A Comprehensive Guide

Maintaining the proper water hardness in your hot tub is essential for optimal performance, longevity, and enjoyment. If your water is too soft, it can lead to various problems, including:

  • Corrosion: Soft water is more acidic, causing damage to metal components like the heater and plumbing.
  • Scaling: Hard water deposits can form, hindering water flow and reducing heater efficiency.
  • Skin and Eye Irritation: Soft water can feel harsh and uncomfortable on your skin.

Understanding Water Hardness

Water hardness is measured in parts per million (ppm) or grains per gallon (gpg). A general guideline for hot tub water hardness is between 100-200 ppm (or 6-12 gpg). If your water falls below this range, you’ll need to increase the hardness level.

How to Raise Hardness in Your Hot Tub

There are several ways to raise the hardness in your hot tub:

1. Calcium Chloride

Calcium chloride is the most common and effective way to increase water hardness. It readily dissolves in water and is available at most pool and spa supply stores. Here’s how to use it:

  1. Test your water hardness: Use a test kit to determine your current hardness level.
  2. Calculate the amount needed: Consult the product instructions for dosage recommendations.
  3. Add the calcium chloride: Slowly add the calcium chloride to the hot tub while the filtration system is running.
  4. Monitor and adjust: Retest the water hardness after 24 hours and make adjustments as needed.

2. Calcium Hardness Increaser

These products are designed specifically for hot tubs and contain calcium chloride in a convenient form. They often have added features, like stain and scale control, making them a good option for overall water maintenance.

3. Water Softener

If you have a water softener in your home, you can bypass it to fill your hot tub with harder water. However, be sure to check your water softener settings to ensure the water hardness meets the recommended levels.

Tips for Raising Hardness Safely

  • Gradually increase hardness: Add calcium chloride slowly to avoid sudden fluctuations.
  • Monitor your water: Regularly test the water hardness and make adjustments as needed.
  • Don’t over-do it: Excessive hardness can lead to scaling issues.
  • Maintain proper water balance: Along with hardness, maintain proper levels of pH, alkalinity, and sanitizer.

Conclusion

Understanding how to raise hardness in your hot tub is vital for ensuring its longevity and providing a comfortable bathing experience. By following these tips and using the appropriate products, you can easily maintain optimal water hardness and enjoy your hot tub for years to come.

Article By Fr4nk