While it maybe partly true it will not work as a self contained eco system , with a little help on your end you could make one that was very close.
I say keep looking for as close of a bio type system that would work and then just help when you have to. after all where is the fun if you don't try to do something. I for one love to try to keep hard fish and am willing to do the work.
I say do the look up work, find things that will work and then do it. Don't let people tell you that its to hard or not possable, sometimes it is
Good luck to ya on it and send pics when you get it going!