That's a bit harsh... But really macz, the lives and happiness of your animals should be your number one concern. They are living creatures and desrve to be treated well. Maybe your lfs told you that you could add more fish or something, but you really can't.Perhaps fishkeeping is not for you.
10gal is a nice little aquarium that will fit nicly in even in a space that is a tight squeeze. Neon tetras are a fish that will gradually get so stressed they will die because of the stress levels.
Like i suggested get some minnow if you really want fish in there because they are a nice little fish smaller than a neons and will go ok in a tank like yours.
I am compistation but notice that I did also say to get a 10 gal and if you forgot that here it isJason, maybe I'm missing something, but I don't really understand why you are telling her to get minnows. I've never had White Clouds, but I really don't think they are any smaller than a Neon. They are also schooling fish, aren't they not? So even if she *could* possibly return the Neon and purchase the White Clouds, she'd still need room for several more fish- which she doesn't have in a 3 gal.
So yes they are but they can be kept by themsevles.10gal is a nice little aquarium