Do you have live Rock in your tank? Why wouldn't you just catch the fish and put them in the 10 gal and treat them. If you do have LR and you use copper, you cant add inverts and your live Rock is ruined. What kind of fish do you have? To answer your question, no it probably wouldn't break their antenia if your careful, remember, they had to catch them to get them to you right. I would seariously consider just catching the fish and treat them only.
Playtime