It's a fiberglass pool. I used muratic acid most of last summer and pretty much got the hang of it. They keep trying to sell me some powder to lower pH so I don't have to worry about the fumes and chemical burn, etc.

Which alkalinity reading should I use...my TA from the test kit or their "alkalinity w/stabilizer correction?" The numbers are vastly different and I don't want to damage the fiberglass clear coat or the salt cell.

Ugh! :-)