Posted this elsewhere: but now that I've figured it out here it goes for my records.
Calcium is plummetting. Yes, coralline is having a growth spurt, but more importantly my crocea is having an insane growth spurt! She closed up some as I reached in to grab something the urchin knocked loose and I noticed she has nearly a half inch of new growth. Between her, the stunner, and the coralline - I think I know where my calcium has been going
Alk is up to 8 now, been taking that increase slowly, I'm a lot closer to sorting that out than the calcium.
I'll test both again tomorrow and see where we're at.