New fish, quarantine and copper

[edikpok]

Over the holidays, I purchased 3 fish (PJ and bangaii cardinals and 6-line wrasse) to be added eventually to my tank. Since I try to avoid introducing ich (and other non-sense) to my main 29gal cube reef tank, the new fish are currently in quarantine for the next 6-8 weeks.
As of right now, I have not seen any specs of ich, but I am pretty sure that they are harbouring some since wrasses’ tank mate at the LFS had ich. My question is, should I add copramine to the quarantine tank? Or what is the best course of action???
Thanks!