I am getting a bit of algae even in the winter. All my chemicals are balanced, but I have a Pentair - IntelliFlo in northern California, and am running at 1500 RMP for 10hrs per day. Do you think that is too low of RPM and/or too short of time?
Your test results (assuming CC is 0) don't really indicate you have algae. Maybe pollen/dirt falling to the bottom due to lack of skimming??I am getting a bit of algae even in the winter.