So I'm thinking of setting up a qt/ hospital tank set up. My idea was to stack two 40 gallon breeders to be able to qt all my fish at once. Here's where the question comes into play. If I use medication in the tanks( not copper) and then after all the qts done I was thinking of using one tank for freshwater storage ond one for saltwater storage. Will that be ok or will the medication leach into the top off water enough to worry about