Pond Boss Forums STOCKING A NEW POND Creating the food chain Fat head spawn

I have seen a FHM male hollow out a spot under a rock no bigger than 5 x 5 inches. I do not know the optimum size but IMHO 2 foot boards should work great but don't expect more than one maybe 2 males using it at a time. I can't comment on the treated lumber as I have not tried that.