You are correct Mr Cody I will have to have a fall harvest. Im hoping that the addition of oxygen through aeration will help facilitate decomposition during summer months. Im also planning on using Blue Shade(R) pond dye to control some of my growth during early spring when the fry are young to avoid any problems associated with young fish and my herbicide. My current pond status has 8-9 mg/L of DO but a large part of this is due to all the weed growth in the pond. During the winter, on the other hand I experience winter kill. I believe this to be do to large decomposition of my plant life. So by removing weeds and aerating I hope to be able to harvest in the fall with decomposed plant life. We also plan to only kill 50% of the pond at a time to reduce the PPM of herbicide the fish are exposed to and leave a little bit of plant life for cover.