Early April: Started seeing "just a little watermeal" around the pond edges
1-May: First treatment of Flumioxazin with hand sprayer to include surfactant. Pond was about 10% covered at this point. Pond went brown and scummy within a week and slowly began to clear in weeks 2-3. Watermeal began to spread again.
5-Jun: Watermeal was back to 10-15% pond coverage. I sprayed again and the same 4 week cycle repeated with the watermeal spreading again around week 3.
5-Jul: Once again, the watermeal was back and slightly more aggressive with 15-20% coverage. I sprayed and the 4 week cycle once again repeated.
14 Aug: Watermeal was back right on schedule and we're in the midst of the scummy residue clearing once again.
I thought I was done for the year but the watermeal made one last run so...
25-Sep: Watermeal growth definitley slower but still covering enough of the pond to take action. It's now 2-Nov and the last treatment looks like it will get me through to the Spring. Still saw a few traces in mid-October but they were just traces.