Keeps getting cloudy - Please help...

[myLABSpool]

Okay the good news is that my pool is pretty much clear now after shocking again a couple days ago. I have not been able to perform the overnight FC test because the last two nights we've had a lot of rain (3"+) and it's expected to rain most of today. I have the solar cover on my pool and will keep it covered till the weather improves on Tuesday. I will hold the FC at 5ppm and make sure the CC stays at 0 like it has been.

Does keeping the solar cover on a pool promote cloudiness or Algae provided I maintain my chems?

Also, while I still have no sign of algae, is it still a good idea to use a maintenance does of polyquat as a preventive measure?

Also, yesterday I dumped my 300 lbs of sand and replaced it with 150lbs of Zeo sand. I know some people here may frown on the additional expense of Zeo, but I figured if there is even a small improvement in filtration over sand it is well worth it to me. I have always been accustomed to DE clarity growing up at my parent house and I just haven't been able to get that with my sand filter.

I will perform the overnight FC test as soon as I can get a night without rain.

Thanks for the assistance so far and I will keep you posted.