Help. Lobo developing hole in the side

[Ronk1109]

Hi I just noticed my lobo is getting a hole in the side of it. Under the colored tissue. Is it splitting or should I be worried?
No3 8
Po4 .02
Calcium 440
Temp 76-77
Ph 7.8
Dkh 8

 

[xxkenny90xx]

Any water chemistry issues lately? Could something have fallen on it or tried to eat it?

 

[Ronk1109]

Any water chemistry issues lately? Could something have fallen on it or tried to eat it?

 

[Ronk1109]

Nope. I test frequently. And none of the fish I have currently pick at coral. I have a few snails. And three peppermint shrimp. Confusing