a valentini is the smallest puffer, next to freshwater dwarfs, but that does not mean he will be happy in a small tank. It's a swimmer, so the smallest tank would be a 45g, better a 55 g.
almost any Canthigaster(toby) puffer can be kept in 30g or more. smaller tank just means fewer tank mates. In a 30g you can probably only keep one or two more fish and by 30g I mean 3ft 30g not a 30g cube or tall.
Originally Posted by crypt keeper http:///forum/post/2973767
Blue spotted puffer stay smaller and are grogeous. Id keep one in a 55.
+ 1 THERE... They are really nice fish!