it's probably nothing...sometimes corals just close for a day or two. Moving the flow around probably didn't help anything either...

If you see them getting worse a nice light iodine dip might help or something like coral revive, I have also had a lot of luck with Reef Dip Coral Disinfectant.

I like to leave things alone and if they still don't improve then I put the coral in low light low flow until it kicks back. I don't recommend doing anything right now until things decline.