The tank is going to be focused around the fire eels, which might turn into one if the start not getting along.
I will start the tank with the eel(s) and 8-12 discus, depending on how I feel about how they fill out the tank. That will be it, except for a ray or two, if they will be ok. That is what I am hoping to get some opinions on here about. I would really like to add one, but only if it will be alright to do so.