Okay, here's the compatability thread. Tell us if people will be able to put nippy tiger barbs with long-finned angelfish who love to munch on neon tetras...and go ahead and throw in an oscar 'cause he's "cute."
Also, what is the "target" size for this tank? 55 gallons-ish? (I know there's perspective involved here, too) If all fish CAN be mixed, then what will happen with relative size (like the neons vs. an oscar or arowana)? Will the neons look like giants to show up, or will the larger fish be way scaled down? (maybe someone will understand that, it's 3:30 am.....
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Maybe there could be a "real" mode and then a "fantasy" mode. In the real mode, less aggressive fish in an improperly mixed tank would slowly disappear, but everybody lives in the fantasy mode!
-L