I've also got some questions on the Oak Pollen, Our Pool in Florida is surrounded by large Live Oaks and as stated by Michael, this year the pollen is heavy. It's the first spring I've been through with this house and as a pool owner. Since all the leaves have been falling and pollen hitting the pool it's been a nice shade of light green but you can see bottom. Is this the pollen or algae, The pool has a SWG. Dumped in a load of bleach to hit 12ppm for a few days and it still looked the same. I'm thinking it may be the pollen, and I'll wait until it's over to work on it as long as I keep the Cl level up. Do you think I should try holding the Cl at 12 for a long time and see if the green goes away. My CYA is 40 and other chemistries are in line. Thanks. Micheal, I use that bleach calc program all the time and love it!