Minimal Tank for Puffer
I am considering setting up a fish only tank for a puffer. I have a real sweetheart for them, but won't put one in my community reef. What do you think the minimal requirements for such a tank would be? I would use non-natural filtration -- not live rock/live sand. I'd consider any Puffer, Porcupine, Boxfish, or Cowfish, but only one fish for this tank.