I've got an abundance of FH in this pond now, and I can only add WM one at a time since I can't buy them. So far I've added 6. I want to avoid the problems created by heavy minnow population and low predator stocking. Mr H wants RES in his pond and I wonder if that could be the solution. If we purchase and stock a few hundred RES will they help at all with FH predation? I know they won't be able to eat the large FH, but will they eat the small ones?