I was in my lfs earlier today and noticed a tank simply labeled "pufferfish". I fell in love with one of them, but I know/knew absolutely nothing about them. After doing some research, I narrowed the kind down to either Green Puffer or Spotted Green Puffer, both of which grow up to 6", but have different requirements. The lfs couldn't tell me for sure what kind they were. I read how to tell them apart, so hopefully that won't be a problem. What I need to know is what kind of environment they like. Can 1 be happy by itself? If so, could I keep it in a 5 gal tank till I can upgrade to something larger? Will they eat freeze dried food (it is impossible to get live or frozen where I live). Is there anything I need to be aware of before I go buy this fish?