is dead algae white. I have a lot of white stuff still coming out of my backwash. several weeks ago I noticed the pool a little green so I then took action. but during this whole spring did not know about cya and chlorine levels and was keeping my chlorine level below 3ppm. my cya is 95-100. can you have algae growing and it not show up really in the pool or does it always look green or yellowish.