The pool is about 6 months old, and I have been maintaining it during the winter. My numbers are all in range except for my TA and FC. My TA is a tad high at 90, but I am working on lowering it. As soon as I get it down, I get to use the borax I have been stockpiling for the last few months!
My FC is also just a bit high at 6. I just turned on my salt cell for the first time, so I am still fine tuning the percentage.
I've only been to a pool store once, and only to buy a smaller brush!