How do you raise the pH in a swimming pool without affecting total alkalinity?

To raise the pH in a swimming pool without affecting the total alkalinity, you can use soda ash (sodium carbonate). Soda ash is a base that will increase the pH of the pool water without adding any additional alkalinity.

To raise the pH by one point, add one pound of soda ash for each 10,000 gallons of pool water. Dissolve the soda ash in a bucket of warm water and then add it to the pool.

It is important to test the pH of the pool water regularly and adjust it as needed to keep it between 7.2 and 7.8.