I have one, 1/4 to 1/3 acre depending on rain. I seine it yearly and move the BG's and GSF to the big pond. If I don't seine it, they will over spawn and the oxygen crash isn't far behind.
It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.
Without a sense of urgency, Nothing ever gets done.
Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP