"not to sure if that is a good mix of fish you have there. the problems i can see are
the puffers are normaly happy and friendly fish and will get on with most , but they do not like fish that are bottom feeders or have lots of floting fins

. so over time the puffer will eat away at your lion fish, "
Okay - that eliminates the puffer.
second is the grouper, i think you will find that these get very big and normaly need a larg tank. i think it is some where over 150 gal, i think i have seen 200+ some where too

. if he is only small now then you maybe able to keep him for a bit and then rehome him

(think they grow fast though)."
I work at a fish store, and big tanks is what we have. So, I can always move him when he grows past 10 -12 inches.
"first of you will need a tank of about 100 gals min for the puffer, angle and the eel think that would be a nice mix in there(pos a few more fish as well, but don't forget they are big dirty fish). hope that helps you out a bit, but some one with i bit more know how will be along soon

"
Okay, I won't go for the puffer. I already have the lion, angel and eel. Can I add a copperband butterfly, a panther grouper (while still small {less than 12"}), and some type of tang?
Thanks, Wonderboy!