That sounds like a good plan. I will do the same.Some people here swear by borates, some say they don’t see a big difference and it was a waste for them.
I saw one person say to keep your pool in TFP shape for a year or so before messing with borates. I’m gonna do that.
I haven't tried that test yet. Currently I'm adding about 1gal a day of 10% bleach to maintain 9-11 ppm.
Makes me feel better, I guess $75-100 in chemicals isn't that bad for my size pool. I really only have a 4 month season. Jun - SeptIn a 61k gallon pool that's probably not bad at all. I'm adding 1/4 to 1/2 a gallon a day in my 20k gallon pool.
Still worth doing the overnight loss test to confirm no loss of FC to anything but the sun.