My lfs owner said that the advertising on those little tanks is what keeps him in business....People refuse to listen to him when he tells them that won't work, and after he's argued with them until he's blue in the face, they buy a million fish anyhow....The customer is always right, I suppose....(I know he doesn't try to talk anyone INTO anything, most of the times I've seen him, he's been trying to talk people OUT of stupid purchases, and they don't listen. I guess when someone wants to spend money, they want to spend money and that's it....)