Injured Six Line

[sleeman]

I've got a small six line wrasse in my QT. He has been in for 3 days now. When I bought him he looked fine, but must have caught himself on something between netting at the LFS and the first day in the QT. The skin has lifted a bit and there is definite swelling. It also seems to be redening. Should I add something for slimecoat? Can I buy antibiotics at the LFS in Canada or do you have to go through a vet?
I also have a coral beauty in there. If I do use antibiotics should I take him out or just let him build up an imunity to the drugs?

Cheers,

Al