Quarantine and treatment questions

[Stege_saurus]

For quarantining and treating certain fish, are there guidelines?
For instance, a sand sifting goby, should I put a small amount of substrate in the QT even though I'll be treating with copper?

 

[Ippyroy]

There are several great threads by humblefish on here that will answer almost all of your questions. Sorry I don't them.