We have a doughboy sand filter. We also have a major "pollen" problem. I have read all the posts on pollen vs algae and been a contributor as well. I have a skimmer sock and a scumball, and will continue to explore options. The stuff is very greenish, but sits on the bottom of the pool (sometimes a solid layer) and the water will be completely clear, FC good, no CC, until I go to vacuum it up. I can vacuum every bit of it possible (though enough of it "poofs" as the vacuum passes to make the water cloudy for a couple days), but it will all make its way back through the sand filter in a couple of days and be right back where it started, covering the bottom of my pool.
I figured out to backwash the filter immediately after vacuuming- you would not believe how yellow the water is that comes out. But it does cut the amount of stuff that comes back into the pool by about a third. Now here is the tricky part- I do not have a rinse setting on my mulitiport (6 ports and no rinse cycle!), so I have been using the filter-to-waste setting. More yellow gunk comes out. At first I would go back to filtering, a poof of stuff would come out of my return for a few seconds. So this last time, I tried alternating backwashing and filter-to-waste twice. I do not have a sight glass, so I just have to watch the water coming out of the end of the backwash hose. It seemed clear, but I still have the poof of stuff coming out the return when I go back to filter.
Question: is filter-to-waste the appropriate substitute for "rinse" or should I be using something else? The doughboy instruction book does not even cover rinsing.