It could also be partial mixing of the water in and just above the thermocline or bottom sediments. Any recent fairly strong winds or weather fronts to circulate the pond? I noticed the three water temp zones are now closer in temperature. Thus top, mid, and bottom have similar density and less resistance to mixing. Mixing, depending of strength, not only circulated nutrients for plankton growth but also fine micro sized detritus. Fall naturally stimulated lesser phytoplankton blooms are common in temperate waters.
Last edited by Bill Cody; 08/12/12 09:41 AM.
