coral closing

Recently bought some frags from my lfs. Got a candy cane, an acan, zoa, and hammer. Zoas have some hair alge that needs taking care of, my acans look happy, candy cane looks ok, but since I bought my hammer it hasn’t opened up great and now it’s closing. It’s a new reef tank, salinity is at...

One of the heads on my frogspawn I’ve had in the same spot for a little over a year is closing up and the center is white. All the other heads are looking good and the gum line is too. There also hasn’t been any change in flow recently. Any idea what could be causing this?

I have a toadstool coral and it always opens and extends when the light goes on, but then it closes in the middle of the day, only opening again the next day. Why is that? thnx.