*gasp* What? What happened?! How did this happen? You can still treat him with strong antibiotics! Go! Quick! Get medicine and QT him! There's still hope!
I have QT'd him! I have put in melafix, I don't know weather that is antibiotics or not, or even where the hell I can buy antibiotics in england... But I cannot go out now as it is 11:05pm, don't think my mum is willing to take me out at this time. Plus all of the shops are closed..
Melafix is only an antiseptic, I'm afraid. It won't help.
Try ordering it online, with overnight shipping. Try Mardel Maracyn. Or non-perscription antibiotics for fish like this or maybe API Fish Antibiotics.