I have a male and female midas cichlid (both about 10-11inches) in a 210G with a 8'' redtail, common pleco, multiple convicts, and a bala shark. The male midas has a spot on his head that is alittle smaller than a quarter. The spot looks to have dried dead skin all over it with multiple red spots throughout. He lets the other fish, mainly bala shark, nip at it. I am not sure what it is or what caused it. if anyone has an ideas about what it might be let me know. if a picture could possible help to identify the problem let me know and i will try to post one. Thanks