How to Lower pH in a Hot Tub With Vinegar


Keeping the pH of your hot tub at the appropriate level is a necessary part of spa maintenance. A pH that is too high will result in the formation of white scaling along the walls of the tub. You can purchase products from a pool supply store to regulate the PH, but if you do not have these chemicals on hand or if you prefer a more natural approach, adding vinegar to your spa can safely lower the pH.

How to Lower pH in a Hot Tub With Vinegar
(Jens Lambert/Demand Media)

Things You'll Need

  • pH testing strips
  • Vinegar
Step 1

Test the pH of the hot tub after the water has been circulating for a few hours. The pH should read between 7.2 and 7.6.

Jens Lambert/Demand Media
Step 2

Lower the pH of the water by measuring out four cups of vinegar and pouring it directly into the waters. You can use either white household vinegar or apple cider vinegar.

Jens Lambert/Demand Media
Step 3

Check to ensure the pump is running after the addition of the vinegar to ensure the acid is properly circulated throughout the waters.

Jens Lambert/Demand Media
Step 4

Allow the waters to recalibrate for a few hours with the pool pump running. Retest using the test strips.

Jens Lambert/Demand Media
Step 5

Repeat the process by adding more vinegar to the water in four-cup increments until the pH has reached the appropriate level.

Jens Lambert/Demand Media

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