reeferadditction...... with the greatest of respect (sincerely), you would want to be keeping big marine fish for at at least 5yrs, and be keeping or have kept a species of full size angel for at least 2 of these years before even contemplating a large angel community. I personally consider it to be one of the most advanced area's of the hobby, simply because while extensive research will help, you need hands on experience with Pomacanthid's to stand a good chance of suceeding.
That is of course not to say you cannot try, but honestly, most people fail unless they have the knowledge, the experience, the time, and the space......... try keeping a medium level angel first, like an emporer, get him through his colour change sucessfully, then you are ready
Large angel communites are abstract, counterintuitive, and unstable at best...... bringing order to the inherent chaos is not something that ccampbell57 or others can "explain" in words I'm afraid.
In short though, the key is big tank, good flow, good size differential, correct species choice and order of introduction
HTH
Matt
