Flat spot in frog spawn/euphyllia

[TheBeta100]

Hey all, my fs has been looking happy and healthy other than this odd flat spot in the middle of one of it’s heads. Is this a flow issue? It’s been like this for about a month since I thought it would get better but hasn’t. If anyone knows why it may be happening let me know! Thanks.

Here it is now.

A few weeks ago when it wasn’t as noticeable. (It’s on the right heed if it wasn’t noticeable from the first picture)

 

[fishguy242]

i think looks great ,just fully extending showing mouth,is good from what i see

 

[TheBeta100]

Thanks! I’m still new to this and didn’t know they show their mouth that much.