Hey guys. This is my first post so bear with me. I have had an issue with yellow algae the past week or so and I believe I have finally got it under control (fingers crossed). Tonight I went and vacuumed to waste the (I'm assuming dead algae) algae that was left on the bottom of the pool. It looked white (it was originally dark yellow). Anyway. After I vacuumed what I could get through the first pass I turned the filter off so I could fill the pool back up with water. I then put the filter back on filter and I got a bunch of 'white debris' that came back through my jets. Am I doing something wrong here or is there something wrong with my system? My filter is a Hayward sand filter (500lb) My sand is full because I just topped it off 3 weeks ago. Thanks for the help.