Hard COral Diseases?

[Nexus13]

I do have a bubble tip anemone that is pretty small but would have to sting the hard corals wouldn't it?

and it hasn't come near the hard corals

I dont' have a kit for measuring DKH.

I dose with Purple Up maybe every 2-3 days.

I have quite a bit of flow and two T5HO's on it and my corals had been growing quite well with all their polyps out until this sudden dissappearance.