Acan help needed please

[katsreef]

So I have had this ultra acan lord for a few months. It's been happy and even the other week I noticed what seems to be new heads growing (you can see it in the pictures below). But now suddenly it hasn't been opening and looks closed all day (also shown in the pictures below). Do they do this when they are growing new heads or is something else wrong? I have other acans in the tank that are different kinds but have remained open this whole time.

 

[Alex Cataldo]

Too much flow/light

 

[katsreef]

Too much flow/light

Thanks, I’ll give it a move to see if it helps!