How to decrease alkalinity in a swimming pool. If the ph level is already high then the simplest way to reduce total alkalinity is to add small amounts of acid to the pool. With the use of a pool test kit get a sample of the water with the use of a water collector. This will be a slow process as you will need to test every day and add more acid until the total alkalinity and ph has been reduced to an acceptable level.
Adding sodium bicarbonate and muriatic acid. Set a target value for total alkalinity. 2read the directions on the bottle to determine how much acid needs to be added to your pool in order to lower it to.
In order to lower the alkalinity levels just follow these easy steps. 1turn off your pools pump and wait about an hour for the water to stop moving completely. Determine if the alkalinity is high or low.
I always use a lamotte colorq pro 7 digital test kit to do this. Take accurate readings of ph and ta in the pool.
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