I haven't dropped the chlorine those last readings were first thing in the morning after putting the FC at 20ppm last night.
I put it back up and kept it all day. Is there a reason I can't do both?
I got some muratic acid and dropped the ph to 7.2 and installed, what turns out to be a rather neat fountain. The TA has come down to 230 just today. While running it looks like this: