Sick Discus - i really dont know.

[matt1981]

hi all

can anyone please help diagnose what could be wrong with my discus / how i should treat him. i went out to work this moring and did the usual feed and came home later on to find what you can see in the pictures. seams like a fungle infection of some kind but i am no expert. i have tested my water and all is fine there but i have done a 50/50 change just to be sure. and i havent wormed them yet. if i do worm them in can this process harm the other comunity fish that i keep in there with them. at the moment he seams to be quite dark in colour and his stress stripes are blacker then i have ever seen them and he just seams to be on his own. can anyone advise me on what i should do.

kind regards matt.