I am thinking of draining my tank due to a ich problem(small one, but Ich) I just need to catch the yellow goby to let the tank go fish free for 8 weeks and it will be rearranged differently when I set it up. After I let this tank sit out the Ich cycle I was thinking of just adding tangs only. I have a purple and blue in QT now and are fine with each other and have no issues. I was thinking of adding a powder blue and a yellow. So it would be 4 tangs total in this big tank when it is ready. I think it will work, but should I get the powder blue and yellow tang now and put them all in the QT tank together so they get to know each other. I do not have dividers in the QT tank now, but I am certain I would need to divide the yellow and powder blue at first. This way I can add them all at one time. any thoughts or call this a dumb Idea. I have always wanted the powder blue and I am getting older, so it may be now or never. I am guessing the biggest fight may be between the purple and the yellow tang.