I am in the process of setting up my Marineland 250. Dimensions are 5' wide x 3' deep x 27" tall. Current fish I have are a volitan, huma huma trigger, miniatus grouper, and a yellow eye, yellow and sailfin gangs. They are in a 125 right now. I am wondering what a cool group of fish would be? I am interested in puffers, eels and rays but have read of so many different issues with aggressive "community" tanks. What can I reasonably add to my current population keeping the tank in mind? Also, I am most partial to the lion.