Bush Hog and Rhino both make a good product. What size tractor? The larger the tractor, the better the cutter you need. It is pretty hard to tear up one with a 30 HP tractor, but put the same light duty behind a 70-100hp and you can tear it up FAST.

1.8 acre pond with CNBG, RES, HSB, and LMB
Trophy Hunter feeder.