A few months back I did some moving things around and selling stuff. The tank they're in now is a 50 gallon breeder.
As far as aggression, I haven't had any problems with my mags bothering anything. They have perched in the same spots since I put them in this tank approximately 4 months ago. Because they do get large, eventually I plan on putting them in a larger tank of their own and letting the BTAs have this tank exclusively.