Anyone do a pond that was designed for Trout or some other game fish? Sure Koi are pretty, and serve a purpose in the landscape pond ecosystem. But for practical purposes, wouldn't a nice tasty rainbow be better? Just think, at the end of the season, no worries of winterizing your pond, just flip a fly out on the end of some 2 lb. test, grill'em up with some lemon. If the algae becomes an issue, a nice carp can be pretty good if you smoke it right!