This has nothing to do with my other thread and pool issue
So I now understand after reading here as well as other documentation that CH is not something people with vinyl liners need to worry about unless it is too high.
Here's the thing that others might like to know as well.
I had a pool store employee tell me, after they agreed of the need for CH in plaster and concrete pools, that you do need it in vinyl pools too because without the CH the liner will get brittle.
I just smiled and nodded. lol
Am I correct in that that statement was bunk?