Wow, this is so similar. We are only about 40 miles from Cherie. We are now using the solar cover, and our "pollen" amount seems to have stabilized. The top of the solar cover is always covered with a greenish dust though. Fall pollen season will be starting shortly due to mild weather and the rain we had, so I expect it to get worse again.
Also, our filter has only been running for a month, and I have vacuumed weekly, but so far I have had only 1 (one) psi in pressure increase. I clean out the skimmer basket and the pump strainer (after a bug swarm got in the pool) so I know it gets stuff in it, but apparently not filter-sized stuff.
Question: So, if you filter pressure does not go up for months on end, do you still backwash on some sort of schedule, or do you just wait until it goes up? I am not sure whether I should backwash for the sake of maintenance or not. We have vacuumed up a fair bit of the "pollen", but since it keeps coming back, so I am not sure if there is anything in the filter or not.
PS We only got 1.5 inches of rain from the hurricane. My pool was already a little low coming into it, so we just drained a little. No green swamps yet.