John- I have a 1/2 acre pond also . I put a 15 lb. flathead in it nearly 20 yr. ago & he gets caught on a rather regular basis to this day. There are many LM & BG still in my pond. As a matter of fact it is overun by stunted green BG.There are many LM still in the pond also. That one flathead wont kill off all your BG & LM by no means.I had always hoped that the Flathead would help control the BG population but that one isnt enough so I dont think you need worry about him.


Dan B