Yellow face Sleeper gobie

[buttered loins]

hi
well just now i saw my sleeper gobie face and it have red marks on it pretty bad and he is swimming sort of wierd not like fast or any thing just not his normally behavoir. he still eats heaps in fact i just gave him a good chunk of prawn.
Does/is he devloping a disease or is this noramlly or what?????????:help:

 

[Agent_Scully]

Tank parameters, size, and when his started please. It helps a lot!

 

[Catpicklesdog]

And a photo if you can.

 

[buttered loins]

well nitrites and ammonia oppm Nitratres 12ppm
Ph 8.3 temp 24.5 degress celcuis 400L size tank (5 foot)
He has been in the tank for about 2 months now.
Sorry getting a picture while he is still is very hard
Also he seems to be recovering but has cheeks still are abit red.