Any update here?
Sure. Coral is doing fine, one of the ones I thought was improving out of the two pale frags lost all of its tissue over night. The other seems to still be holding on. The other frags seem to be coloring up.
The chrysophytes however are back in a bad way and have darkened. I'm dosing ~5ml a day of the mixture to keep a detectable level in my tank and I think they're eating it all. Alk usage has almost tripled over what I started with.