tcamos said:Even though a 10 gallon tank seems big enough please understand that it's actually a rather small tank.
The 36 gallon is a tank you can work with. If you have your heart set on a puffer, like a green spotted puffer which is a great beginner puffer, then perhaps you can rehome the other fish you have and use that tank for the puffer.
Dwarf puffers will work in the 10 gallon and if you are sure to buy only one male, two if the tank is heavily planted, and the rest females you can manage to have a few in there. It's the males that you really have to worry about when it comes to territorial aggression. I kept two males and eight females in a 29 gallon tank. It was planted with tall plants like Amazon swords. It also had other fish in it and the dwarfs were fine with them.
So, if you want puffers in the 10 gallon then it's dwarfs. If you want bigger puffers then you need to get another tank or use that 36 gallon.
Ah the thing is, mine were male and female and the female killed the male. And sexing them when they are this big ------- is hard I'd still say only 2 in the 10 gallon. It's only 2 gallons bigger than mine was.