How about running some staked lines of heavy mono across the pond above the surface? I know it's five acres but you can buy cheap spools of mono of 20 to 30 lb. test at Walmart of two or three hundred yards for around $3.00. I use this mono to keep herons out of my ponds.
It would seem you would not have to run a lot, as all it would take is enough to frustrate them and being fairly invisible scare them, they won't be sure where all the lines are.
Last edited by Cecil Baird1; 02/19/14 08:50 PM.
