So, I've been thinking of starting a tank with some minnows. They seem cute and they're pretty inexpensive fish. However, I don't really know what they require beyond that they're cold water fish. Do any of you know what would be a good size for a tank of rosy red minnows? And what about filtration, substrate, and cover? Are white cloud minnows the only possible tank mates for these minnows? I don't really want a big fifty gallon tank, so no goldfish. Can anyone here tell me what a good setup would be for these fish so I can decide if I can set up a tank?