Habitat/Care: Controversy exists over whether or not any puffers are actually true freshwater fish. I believe the figure eight to be one of the few that falls in that category. They originate in the freshwaters of the Southeast Asia region, and although they tolerate brackish or even full saltwater, mine have always done best in freshwater. They prefer a neutral pH and soft to moderately hard water. They require ample open space to swim, but also need places to hide.
Generally puffers are not well suited to a community tank because they tend to be aggressive. Even puffers who have previously been docile can become aggressive as they age, or if they are not well fed. I've had puffers who got along very well for long periods of time and then suddenly turned on their tankmates and chewed them to pieces. On the other hand, most owners have found figure eights more peaceful than any other puffers and some have successfully kept them in a community tank.
