I have reported several flathead growout involuntary projects before. FlH do have a place in pond mgt just as do most every species. You have to understand the species and be comfortable with the risk and range of possible outcomes. IMO the situation for FlH is limited to the apex predator in a pond with that as its only goal. I have seen 5 acre BG ponds wiped out by less than 12 FH over time. The FlH went in as 1 lb fish +- and grew to a range between 12 and 50 lbs. It may take a while but their food consumption grows exponentially. They target food by preferred size (like many predatory fish). They are not gape limited by pond fish so they often target the biggest BG at night. They can wreck a population of spawning BG males quickly. When they do the yoy are history.

It can be done if that is the goal. It's your pond so go for it and please post the continuing results.

See this thread for the science.

http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=123793&fpart=1