returned and pool completely cloudy

[day1]

Now that you've got rid of the bloom and water is clearer, you should be able to get in pool and look underwater across pool and check to see how it looks.
If you have your Cl levels maintained for some time but still have cloudiness, could be from small floating dead stuff your filter can't catch. Now is the time to get some clarifier and put it in. Probably best to mix in a container w/some pool water and then add it to pool. This will bind small particles together and sink them....then it's time to vac bottom! I was amazed how crystal clear this got my pool overnite. Some folks on the forum think it's a waste, and I thought so too until I tried it.
Another thing that'll help your sand filter is a little DE added thru skimmer.