how do you people convince your parents to let yall get a bigger tank? I was thinking about tellin my mom that id put the bettas in the 15, divide it into two and get a bigger for the others. Shes dead set against it though. Were going to need a bigger one when they get to full size. And the goldfish is getting huge! I dont know what to do, and its not that I want anymore fish, its just so that the fish have room when theyre full sized.