Water clarity last night was 20" Secchi. The water has had a slight light greenish film on the surface for a few days, but the water column is still clearing up in general. In the past, some wind action or rain will cause this to disappear for a few days. Feeding last night was decent, but not quite as enthusiastic as the night before.
Still premature, but right now, I am hanging my hat on the removal of some craws causing the water to clear. Other factors that I have noticed are a 5 degree drop in water temps over the last week or two, a recent heavy inflow of water (which normally muddies things up), and the water hyacinths are looking a lot better and putting on some size. I don't see any correlation with these changes, but just stating for the record in case someone has some other theory to offer.