BTA's closed up

[MarkoD]

I went to vegas over the weekend. left the tank, lights on timer, no feeding

came home last night and all looked good. Cyano almost gone (just a little left on the sand)

today i get home from work and notice that both my rose bubble tip and green bubble tip anemone are both closed up.

anyone have any idea why this would be happening?

both my clams are happy and one is opened more than it has been in the past month that i've had it.

frags have more growth in the last week then they've had in the last few months.

maxi mini carpet anemone is fully opened

what effects BTA but nothing else?