WS, I have great data on this. Sea Pines on Hilton Head Island tracks things closely. They had ugly brown water. They had been fertilizing. I told them to take their Do meter and check, sure enough low in am then high in pm, classic phytoplankton, visibility nice 28 inches. We send sample to Bill Cody and sure enough he listed many species of phytoplankton. Crazy thing is about 3 days after sample submitted lake turned beautiful green color. We do not know what species of phyto is brown vs green and not easy to find out. However fyi it can turn quickly. Also easy to tell if the brown is good for fish you can take dissolved oxygen readings, it will tell you if phytoplankton or just suspended inorganic particles.
