well I did this about two months ago,all fins healed up within two weeks and havnt had any truobles sins. the reason they were stressed out enough to fight was because I had jsut moved them into a new tank. fighting stopped, fish healed, every thing is good. i carnt belive all the crap I got from you guys. you guys watch ure pirahnas rip other fish to pieces and then you complain about me snipping of a tiny bit of fin. i didnt even take the fish out of the water, and it didnt freak out as if it was in pain. every thing went back to normal and the fighting stopped. if any of you arnt complete arrogant ass holes I think it would be quite right that I get some apologys!