When you fill the filter, whether it's sand or zeo, but ESPECIALLY if it's zeo, make sure that you start it up in backwash or rinse mode. Otherwise you'll stand there and watch your nice, clean, sparkling pool become a mud pit right before your very eyes--and it takes several days to clean up the mess. Let me know if you actually see a difference with zeo--I didn't...

You need to keep the chlorine levels up in your pool at least at 12-15 ppm, until all the ammonia from the Yellow Out is gone, and until all the algae is dead. If you let it come back down now, you're in for more algae before you ever get the cloudiness cleared up from the last time.

Janet