Rosy Reds are a popular pond fish, often used as a dither fish for fancy goldfish and koi. In a pond they will keep the insect larvae to a minimum, but will also eat goldfish and koi pellets. They are active even when the pond freezes over in the winter, and can often be seen swimming under the ice.
The Rosy Red Minnow are a very inexpensive, hardy fish. They are a great addition to someone who wants a cool water tank but does not have the room to house goldfish. Or to someone who just wants something different in their tropical community tank.