11-28-2011, 01:49 PM
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Agree. And to answer your question on the figure 8 puffer, this comes from Matt Ford, a biologist. This fish attains over 3 inches, so one in a 10g is going to be really pushing it, and any more needs a much larger space.
Best kept in a heavily-planted setup with twisted roots and branches to provide additional cover, although soft-leaved plants may be chewed by the fish. Leave some open spaces in between for swimming, as this is an active species. The use of a sandy substrate and floating plants to diffuse the light is also recommended. This species is very sensitive to deteriorating water conditions, so regular partial water changes are a must. Although it's often considered a true freshwater species, it tends to be more long-lived with the addition of marine salt to a sg of around 1.005 in aquaria. It can also be maintained in freshwater, however.
Although it will live in the company of conspecifics in a suitably large tank, studies have shown that specimens kept singly usually live much longer in captivity. If you want to keep more than one, try to buy at least four fish, so that any aggression is dissipated between the group.