South American Puffers are lovely looking fish, but there are a few things you need to know when taking them on including...
They can work in a community, but it is still a risk. Tankmates must be zippy tropical fish that also enjoy a strong current, that do not have tempting long fins.
They get bored very easily and will "pace" up and down in the same spot of glass. You need to stimulate them by having a ~50% heavily furnished maze from top to bottom, using loads of bogwood (and plants if you wish) to create a myriad of tunnels.
They love a strong current, 10-15x real turnover blowing cross the length of one open length of the tank will keep them happy.
They are very social for puffers and will often huddle up together at night, so a group is preferable.
They will almost certainly need their beaks trimming every few months, even with a snail rich diet. This invloves catching the puffer and sedating it with a very careful dose of clove oil, before using a set of strong clippers. Not for the faint hearted!