This is a great forum and I'm appreciative of all of the help. I'd like to get your ideas on maintaining a safe PH during the winter. Last year, I opened the pool to find the PH over 8 and scale covering the pool (it was bad...cut your feet bad).
Anyway, thanks to a better test kit and the pool calculator I think I have a handle on maintaining the PH at the proper levels while the pool is open. You should know that we have hard water, so my hardness is normally over 350 (currently at 375). As a result, I have been running my PH lower than the officially recommended 7.6. It's at 7.1 now because I am lowering the Alk.
My current numbers:
Cl - 2.0
Alk - 130
PH - 7.1
CH - 375
CA - 50
Last year I closed the pool with the PH around 7.5. Given what happened, I will probably close it with a lower PH. Does that sound right? Any thoughts or ideas you have to prevent high PH and scaling over the winter would be appreciated.
Also, I have a hard cover that is on all winter. I also bought some Scaletec to add before closing.