Oh... btw... i finally found out what the injury specifically came from... you know those tank hoods that have semi-perforated sections for adding your filter, heater, etc? Well... after I created those holes, I neglected to sand/file those little perf tabs back down... that's what he got hung up on when he was striking at the chinese algae eater towards the top of the tank... just thought I'd throw that out in case anybody else has forgotten to file those little buggers off...
BTW, he's doing fine now. The spot is still a little on the light side, but it looks much much better.