How Much Borax to Raise pH in Pool?

Borax, also referred to sodium tetraborate, disodium tetraborate, or sodium borate, is a powdery, white mineral made of boric and boron acid and is found in regions with seasonal lakes. 

For most people, borax is a household cleaning product. However, you can also use it to raise the pH in your swimming, and the question is how much borax to add to raise it? 

You cannot know the answer to that question unless you know how to use it. That is why we have written this article.

Using Borax to Raise pH in Pool

If you want to increase pH, you can easily add borax alone. However, if you wish to boost the pool’s borate level to cushion the pH and the water’s pH is correct, you might need to add the borate and then acid to decrease the pH. 

The amount you will need to add depends on the initial pH level, your pool size, the borax you are using, pool alkalinity, and the targeted water chemistry. You can use a water-chemistry calculator (found online) to know how much borax to add and whether you should add acid.  

Steps to Follow

Here are the steps that you would need to follow to ensure that you add the right amount of borax in your pool.

  1. The first step is to use the online calculator to know the amount of borax you will need to add to your pool.
  2. Add the recommended powder to the skimmer while the pool’s filter and pump are running. 
  3. Wait for 24 hours before testing the pH level.
  4. Add more products if required to increase the pH to the ideal level.
  5. If the calculator shows you that you need to add acid and borax, start by adding half of the recommended acid and half of the desired borax. Brush the walls of your swimming pool to ensure that the product dissolves faster. 
  6. When the borax is fully dissolved, add the other half of the acid and then the rest of the borax. Brush again and leave the pump to run for about 48 hours.
  7. Test the pool’s pH and add the products if the pH level is not correct. 

Useful Tips – Borax Guide

Here some useful tips that you should remember when adding borax to your pool.

  • Use the online calculators to determine how much borax to add.
  • The amount to add depends on the initial TA and pH level of your pool. 
  • At around 100 TA and 7.5 pH, the amount is about 8 ounces, so 0.5 pounds of borax can raise pH in a 10,000 gallons pool.
  • That same amount of borax can increase a pH of 7.0 by about 0.04 and a pH of 8.0 by about 0.14.
  • Also, at a pH of 7.5 and TA of 80, that amount of borax would raise the pH by about 0.12 while it would raise by 0.08 if the TA is 120.

In Conclusion 

There is no right answer to the question of how much borax to raise pH in the pool. Use online water-chemistry calculators to compute the ideal amount.