I would ask what the motive is and logic? For example I use a second tank as a QT for fish to screen 30 days before adding to my display. I run @Humblefish QT method of 30 days CP >= 2.0ppm - 2.5ppm and the last 10 w/ General Cure. If I could do it all over again, I would buy from Elliott QT fish and use my second tank as a coral QT as event with my Fish QT I introduced fish born illness to my DT via coral.