You need 5 gallons per puffer for territory, so for a few, go 20 gallons. :) I've read that they can be species only but also read that they need to be totally alone. It's a crap shoot. :) That's why my puffer is alone. Plus I only have so much my floor can take too. That's also why Huey's in a 6 gallon all by his lonesome. :D
I've read that, like bettas, puffers get more agressive with age. So even if you start out with some babies, unless the tank is big enough, it ain't gonna be pretty when they're grown! :0
DormDrax will probably slap us for turning this into a puffer thread, lol...
That'll teach him not to 'wander off', lol! :)
*Drags in a Helium Tank* Oh no... please go on about your Puffer fish... May I seeeeee them?
So you can all feel better. I returned the fish, got my money back... and that old guy who works there (And knows fish) just laughed when I told him... saying that who had helped me last night was a moron.
Drax is now in the tank alone... doing nothing but going all along the plants as if going.
Sorry I only read the first two pages of this thread but I found that if you take everyone out of the tank rearrange everything then add the other guys in the tank and THEN the betta, things work out better. My first community try I did it your way and my betta was after everyone. Once I took him out and changed everything i added the other fish first and he didn't even bother with them, he just swam with them! I see on this page your trying out puffers? I don't know much about them but in my 10gal I had a HM betta, 8 rasbora's and 2 snails! Its now a 5 girl sorority but it was fun while the betta was still alive!