You can't do a reef with a dog face. You could do FOWLR
, I would go with a 125 gallon with a sump set up. Get at least 100lbs of live rock, and get your dog face. I really think you would like a trigger too, look at some of them. The undulated triggers are beautiful but very mean, he would leave a puffer alone. Do some research and see if you like any of the triggers or lion fish. It will have to be a larger aggressive fish to leave the puffer alone.