Just got back from buying some large koi off a guy and the transition was less than smooth to say the least... Took about two hours to catch them, they got caught up in nets, banged off rocks, dropped on the ground ect then had to endure an hour long ride before they finally made it back to my pond....They seem to be ok but just wondering if there is any preventative measures I should take to maybe relax them or boost their immune system in case they received any cuts or abrasions?.....Melafix perhaps?