I have a 60 gallon with a 3in abei puffer, and a 4in green terror. I wanted something that can be as aggressive as the puffer so it could defend itself if it needed too, I've had them for a month and it has worked out extremely well. There is absolutely no fighting between the two, only occasionally does the green terror slightly push the puffer, but that's only because the puffer invaded his territory. Could anything else work with these two? Or should I just keep those two by themselves in that tank? Could a leaf fish big enough live with them?