What do you think of this idea??

[kadaytar]

IMO a 5 gal tank will be too small for a big fish. You will stress out the fish also you have to feed the fish in a quarantine tank as well so it will also be very difficult to keep acceptable water parameters in a 5 gal. If i were you I would go with a 20 gal. I don't know your tank size but if you have a large tank with a big bioload 5 or 10 gal refugium will be small too.