Do a search here for more info. They will live in the pond fine until something eats them or they die of old age at 10"-11". They are quite predacious on small fish and invertebrates that will fit into their mouth.

Unless you are able to do something no one else has be able to do, they will not spawn in your pond without a inlet stream. Many people cannot distinguish between a fathead minnow and a small creek chub. Both are "casually" quite similar in appearence.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management