qaurantine

I have decided to qt my white tail tang along with a copper band and fox face. Doing a 36 gallon and going to observe and then treat if needed. Is this the route to go? I will be keeping the medication on hand and also will be feeding vitamins, as in selcon and/or vitachem. Any advice with these...

I have a LFS that qt their fish but I am not sure if their process is completely safe. They have all tanks connected together with presence of coppersafe (2.00-2.50 ppm). They receive new fishes and put them into the same system. Is it possible for fishes that have been in the tanks get...