I've read the Sticky about the QT so I'm going to follow that step by step. Now the question is, how am I going to QT all my fish? Do I have to do it all at once? How big of a tank do I need for 1 yellow, 1 Powder brown, 1 Dot-dash Butterfly, 1 scooter blenny, 1 mandarin Dragonet. BTW, thanks...