I'm going out of town for 5 days, and I'm leaving the pool care in the hands of my lovely wife. The last time I did this, I came home to a pool with very low chlorine levels (.5 or 1) and one of the skimmer weirs blocked causing air to be introduced into the pump. No bueno. Since that event, I've realized that she isn't going to stay on top of monitoring things, so I need to make the pool as much autopilot as I can when I'm out. I bought a SWG so chlorine wouldn't be an issue, but since my plaster is still curing (along with a spa overflow and now the swg bubbles), I normally add acid daily to keep the pH in check. Because the SWG is so new (installed July 4) and I'm still playing with the settings and pump run times on it...I didn't want to take any chances of the FC dipping, so I added 1 gallon of 10% LC this morning. This will raise the chlorine above 10ppm, which will make pH tests ineffective until it comes back down.
My question---how many days can a plaster pool have a pH above 8.2 before scaling starts to occur? Based on my reading and addition history, I have been adding anywhere from 8 to 32oz of acid per day to keep the pH in check. I'm inclined to try to get her to add 4-8oz per day just to stave off extremely high numbers without overshooting, but I hate just guessing at something like adding acid for pH...
What say you?
My question---how many days can a plaster pool have a pH above 8.2 before scaling starts to occur? Based on my reading and addition history, I have been adding anywhere from 8 to 32oz of acid per day to keep the pH in check. I'm inclined to try to get her to add 4-8oz per day just to stave off extremely high numbers without overshooting, but I hate just guessing at something like adding acid for pH...
What say you?