Trouble in Paradise

I’m trying to work out a few issues with my tank. Think I’ve been running my nutrients too low and have slowly browned out my shades of fall and my red planet acros. No polyp extension. Of course my stylos, digi, birdsnest are doing fine.

Do you have any pointers?
PH 7.9 - 8.04
no3 - 2ppm
Po4 - undetectable
Alk 8.4
Cal 400
Mag 1305
Radion gen 3

Fuge runs inverse lights. Planning to feed more and cut skimmer runtime to 12 hrs.