is my zebra (botia striata) sick?

[stevenufc]

i have a four zebra loaches in a 215L tank one of which has developed a black face it feeds and behaves normally and the water parameters are ok

is it sick??

[palaeodave]

Is it possible to put up some pictures?

[stevenufc]

not sure about photo's as he doesnt stay still long enough but will try

[stevenufc]

hope this is visible

http://i175.photobucket.com/albums/w160 ... C00140.jpg

its like he has either got some form of disease or has bumped himself

any help gratefully recieved