I started my SMB in a 1 acre pond by adding 10 fish in 2 consecutive years. I have a healthy spawning population now. My other species were YP, GSH, RES, and lake chubsucker. I added FHM at the beginning as well. YP, GSH, and SMB were all fat and happy based on the ones caught through the ice by a friend and his son this winter. Small lake chubsuckers and YP used to wash out the drain during flooding, but i have not seen this since installing a water control box to raise the water level in the pond by 1 foot (emergency spillway has never been used in this pond). I used rocks for my spawning structure based on info provided here. I located my bigger rocks on the deep end to keep the smaller rocks from rolling downhill. My smaller rocks were bigger than the 2" crushed limestone shown above.

[Linked Image from i.imgur.com]