I am wanting to get a fire eel to go into my 125, but I am finding mixed information about them.. Is a 125 big enough for a adult fire eel? (I am getting a baby one..) Could I put other fish in with him? What kinds would he be ok with? Should I get two? I only want one but have heard they do best in pairs, and also heard they will not tolerate another fire eel in the same tank.. I am wanting a few medium sized peaceful fish to go with him.. (My aquarium is currently setup but empty..)