Another one just occured to me, and I wish I had thought of this one first. It's sad too, because I'm such a huge Seachem guy.
http://www.seachem.com/products/product_pages/StressGuard.html">http://www.seachem.com/products/product_pages/StressGuard.html</a>
Stress Guard is made to cause a fish to produce a slime coat and causes a wound to coagulate and close, while also being an antiseptic to prevent infection. That's proabably the best one.
I would run some carbon for a day and do a water change before you dose this with the Melafix in there. They're probably fine together, especially beacuse the active life of Melafix is only about 24 hours, but better safe than sorry. Certain combinations can prove very dangerous- Mixing Paraguard with copper will almost always prove deadly. Paraguard is a reducing agent will cause copper to release from its bound form, causing a huge spike in the copper level.