crashing Xenia

[Gordoe]

Hey folks, I've got a piece of Xenia crashing. Any suggestions??

Tank specs-
65Gal with 15Gal sump
Temp 81
Alk 11.2dKh
Ph Approx 8.2 (I think I'm color blind and wife wasn't around)
Sal 1.023

I dose with Iodine once a week with Kent's Expert series.

The only thing that I did differently was add my make up water with a combination of iodine and coral vite.. Anybody think this might have been the cause?

Gord

I really like my xenia.....