How do i know if this Brain Coral Frag is doing good

[jettpeterson]

I just got 2 frags yesterday one of which being a small brain coral for my 10 gallon the colors look amazing but I just don’t know how to tell if it’s doing good or not
And I was asking for others opinion

 

[fish farmer]

Look at it at nighttime to see if it puts out feeding tentacles. It looks good from the pics, usually if they are stressed they shrink.