Thanks everyone for your help... my trigger seems to have shown signs of improvement now.
I didn't actually do anything (medication wise) to him, just did a water change, made sure he ate and left him alone (to hide under the rocks as he loves doing). His eye is starting to clear up; according to the LFS
its a common thing for triggers and they usually recover on their own. He does have some battle scars from rubbing on the LR
and his tails a bit shaggy, but he seems happy and should be ok.
Thanks for the advice though, i'm sure going to need it again one day.