Here's an article:
Dwarf Puffers are Great Little Freshwater Fish
Got 3 of the little buggers.
It's a Fluval Spec V, so 5 gal. I may have to use a sponge filter because the power filter puts out a strong current. I hope to redo the tank and plant it, since I read they like planted tanks. OR in a few months, relocate them and go with my original plan of turning that tank into a micro-reef with ricordea coral, a boxer crab, and maybe a shrimp goby. We'll see.
And those are the snails I want them to eat. o.O
I shall name them Mary, Edith, and Sybil even though I think the are actually all males.
EDIT: The white flecks that you can see on the tank bottom are the planaria that I can't get rid of. How I got such a bad planaria outbreak in a tank that previously had one male betta in it . . . (said betta is now floating in a cup in the tank because he doesn't look like he'll last much longer).