Despite reluctance we've used muriatic acid in attempting to lower pH. CYA is always a problem despite not using pucks (except during one weekend trip), it was 40 when the pool was opened May 3 then reached 80 by May 29 where it has remained. CH has been consistently 250, TA 80-90, FC in the recommended range based on FC/CYA chart. pH has been stubborn - since June 2 it has been in the range of 7.8 to 8.0. We bought a gallon of muriatic acid June 25 and added at different times based on the old Pool Math page with a target of 7.6. As of this past weekend, the whole gallon is gone and pH has never gone below 7.8. Nothing critical - the CSI has been 0.1 or less.
We weren't real keen about muriatic acid in the first place, now even less so since it doesn't appear to work for us. Someone responded to another of my posts saying they let it get up to 8.0 then knock it down to 7.6. Could this issue be something unique to our pool or should we try a different chemical like dry acid?
We weren't real keen about muriatic acid in the first place, now even less so since it doesn't appear to work for us. Someone responded to another of my posts saying they let it get up to 8.0 then knock it down to 7.6. Could this issue be something unique to our pool or should we try a different chemical like dry acid?