It's extremely common to hear that. Almost all your stocking guidelines talk about tank requirements in terms of gallons, which are irrelevant. The number of gallons are unimportant - it's all about the dimensions of the tank.Yeah I figured that aswell. I should've got one more horizontal in length.
It's never too late to upgrade! My betta and cories started in a (standard)10g and when I saw it going well I upgraded first to my spare 20g and now they are happily in a 55 which gave me more room for a nice large group of cories.Yeah I figured that aswell. I should've got one more horizontal in length.