Great hardy fish. These are fish you can cycle tanks with and still want to keep when its done cycling! They may not look like much in the store, but get them into a tank with a few plants and they really shine. They are also very easy to breed, If you want to try breeding egg layers, these are the way to go.
Terrific little cooler-water fish, these... I've found that, while these guys (and of course, the golden version and the long-finned "meteor minnows") are perfectly happy in the same temperatures and water conditions as goldfish, they may not be the best long-term companions. Larger adult goldfish regard them as tasty snacks if they can catch them! ~Bruce
I love white cloud minnows. They are hardy (but do make sure to start off with healthy stock, once infected with anything they go downhill quickly!), peaceful, active but not nippy and very showy, not to mention cheap - even the fancy gold ones will not set you back more than a couple of dollars. The males will display to one another frequently but rarely do any damage. Males and females are easily differentiated even at young ages - the anal fins of the males are wide and fan shaped at extension whereas the female's are triangular and more wedge-shaped. Mature females are also noticeable fatter and the males more colorful. There are several cultivars of this fish, and in addition to the wild type specimens one can find gold minnows and rosy pink individuals as well, and long-finned forms can be found in any of these colors and are particularly prevalent in the rosy strain. the rosy strain is also unique in which not only the caudal and anal fins are red as in the wild and gold types but rather all of the fins. These fish do best in schools and over 6 is best, but the fish in the school can be of any variety. I have three golds, two regulars, and a long-finned rosy white cloud minnow and all shoal together regardless of type. They do fine in aquariums as small as 5 gallons, which provided they are well planted and filtered adequately easily house the required group of half a dozen of them, but they will of course make use of as much room as you will provide. These fish love a current and the more the better. They do not show their best colors nor live to their full lifespan in temperatures over 75 degrees and ideally should be kept between 60 and 70, meaning tankmates are limited but not nonexistent, mostly to variatus platies, other minnows, danios, peppered cories, shrimp, gold barbs, weather loaches, and smaller goldfish, but this is not a huge problem as these fishes look best in a species aquarium.