I have an in ground pool with a vinyl liner. 42,000 gallons. I have the chemistry correct. The pool is green. I added 7 lbs of shock, cal hypo,and waited 1 hour (this is what the directions for the Flocculant say to do)and shut the pump/filter off. Added 2 bottles of Revive( a flocculant) it's been 36 hrs and half of the algae is on the bottom like it should be, but half is floating on the surface. This is the second time this year it has done this. I'm just now starting my pool by the way. A week ago I did the same process with the same results.the first time this happened I tried turning on my pump to let the filter remove the surface algae, but it went straight through my filter and clouded the pool back up. So now I'm back to the separated algae. I also bought a net for algae and it doesn't work. It just pushes it around the pool. This is my 7th year cleaning this pool. I'm not an amateur and have never seen this before. Has anyone seen this before? What did you do? Any ideas? Oh and I have a sand filter.