Matt I do like your fish choices, but I am going to offer some constructive criticism
Here is what I see ...........
The tank is way to small, honestly you should have waited.
The lion will quickly out grow this tank.
I think you will have a tough time keeping up with your water quality.
The fin on your lion may be broke because the trigger started picking on him, watch this situation close.
Eels prey upon lions in the wild, so again, it could make a meal of your lion.
Your fish require a variety of foods, not just silversides, you can offer chopped foods such as, Octo, Squid, Scallops, Raw Shrimp, Mysis and so on........
Good Luck,
Kaye