Last year I relied on natural habitat in our pond for the Fatheads to breed on. They did very well using what they could find. There were plenty of flooded logs, stumps and brush available to the 3 or 4 lbs that I put in to use for romantic encounters. By the fall they were everywhere. This year I am going to add some structure for them. I am saving milk jugs that I am going to tie together every couple of feet to make a string with. I am thinking I will partially fill them with water to keep a portion of the jug underwater. I am also looking for wax coated cardboard. I have heard you can just float it and recover the trash at the end of the breading season. Just some thoughts.