hi,
i'm sorry to butt into the conversation, but, a 90 gal is not a bit enough tank for any typ of schooling butterfly. Schooling Chomis? Yeah. If that's what you're looking for. You could about 6 chromis and like one drawf pygmy angel. Maybe even just stick with just the chromis for a while and build up a nice reef with some inverts. I guarantee you'll get much more satisfaction than cramming a bunch of fish in a tank that's too small and then having to fight the disease and problems that follow. ...there's nothing worse for a hobbyiest (aka, fannatic (obsetionist (sp?
than to see their envisioned dreams go to down the tube because they ignored honesty and reality in place of desire.