i've heard of a few people trying them in large ponds, Drawback to that fish are, They get 40" long and don't keep that coloration, they become a very dull grey that is very hard to see. They are a schooling fish, They need company of the same type and size to really feel comfortable in a pond, Recommended that three to five individuals be kept together. When they do start to get large I have heard they are worse on plants than Koi as far as digging and up rooting plants. It is a intresting looking fish for sure when young but once I did the research and heard more from individuals that did try them I decided it wasn't a good canidate for my pond so I passed on trying to keep them. Good luck with it and keep updates coming. Some things I don't know are How fast will they grow in a pond, how long before the bandings start to fade and how they react with temp. changes.