I have the same issue. A green pool even though my FC is consistently 3-4 and my CC is 0. I have a SWG and sand filter and last night i put a cup of DE in the skimmer to try to help it get the smaller stuff.
Based on reading here, even though the CC was zero, I figured it must be algae so I decided to SLAM it. I went ahead and dumped in 8 gallons of bleach last night and got the FC up to about 20. Should I continue this or am I on the wrong track?
What is the solution if it is indeed pollen? Shouldnt the filter be able to handle it?