This past Friday (2 days ago) I had my aggregate stone finish IG pool acid washed to smooth out the color consistency of the interor pool finish. I was out of town when the work was completed but I know they lowered the PH down considerably during the process.
Since yesterday afternoon I have had my filter pump on high speed (80+gpm). My CH (750) and TA (225) are both way high due to the work that was done. I am doing the aeration cycle along with acid to lower my TA. I am thinking I should just drain a portion of the pool and attack the CH first. The only way I know to lower CH is by draining water. My fill water has the following specs PH=8+, CH=100, TA=140.
Does anyone know an approx amount of how much water I should replace if I have a 15250gal pool with CH of 750 and I want to bring it down to 400? My fill water has a CH of 100.
Any help would be appreciated thanks.
Currently the water is at ph 7.4, TA 225, Ch 750. I am not concerned with FC at the moment but it is at 5ppm+ in a shock cycle since the filter pump was off for a few days.