favia help

I have a sector 9 favia that is swelling during the day. Is this a sign something is wrong or is this ok?

Hello everyone, My Favia JF Candy Corn lost its color. It is growing and healthy eating and exposing polyps well but the color. See my parameters in the attached photo. Is there anyone with the same experience? What do you suggest? Please see pictures below, before and after. Other corals...

I was looking at my reef today and realized this favia looked like it had come sand on it, I suspected maybe my fish spit some sand on to it. I was blasting it off and realized the actual flesh starting coming off. There have been no light changes or flow changes. I’ve had it for 2 months...