Red-Devil Man,
how big is your figure 8? ive been keeping them for years. they are great fish but must be fed a strict diet of meaty foods. if its still young you could get away with feeding it frozen mysis, frozen bloodworms, and frozen krill. as it gets older, feed it cut up market shrimp and mussels. feed it snails as much as possible throughout its entire life. this is important because it will help to wear down their beak-like teeth. without this their teeth grow to the point that they will starve. you might want to breed you o wn pondsnails in a seaperate tank. its real easy. i do a 2.5 gal. with a lamp pointed toward it. a small powerhead, no substrate and lots of expired food. give this tank a 100% h20 change once a week, cause snails are actually quite messy. anyway enjoy your figure 8 puffer, dont froget to give him lots of hiding places. if well kept these guys will live to be about 17 or 18 years old.
nick