I am a 4 year owner of a gunite pool located in Bluffton, SC and have the water chemistry thing down fairly well. I have an issue that is new this year that I haven't seen in previous years. The water surface is covered with clear matter that I can't identify. Attached are 2 pics showing what it looks like. The water is perfectly clear and fairly well balanced (FC=5 ppm, CC=0, TA=100, pH=8.0, CH= 250, CYA=55). I have tried running the 2 speed pump on high and suction set to skimmer for 8 hours, but the next morning the stuff is still on the surface. When I try to skim it off with a net it just seems to disperse into smaller pieces. I backflushed the filter and the gauge reading is 10.5psi which is normal. The filter media has never been replaced or chemically cleaned, but based on consistent pressure readings of 10.5psi after flushing, doesn't seem to need it. It is a gunite pool, plaster, 11000 gal, Hayward 1 HP 2-speed pump, Triton TR-60 sand filter, Hayward CL-220 chlorine feeder. Does anybody know what this stuff might be and how to get rid of it?