1. Brush your pool completely, to make sure you don't have any hidden algae left.

2. Wait 4 hours. If you have no green after brushing, still have good chlorine levels and OK pH, it's safe to swim from a sanitation point of view. What's NOT safe is the cloudiness: it only takes a few minutes (occasionally, 30 seconds) of submersion and a person can no longer be resuscitated. So if you let your kids play, WATCH them, and maintain a running head count, because you will NOT see them on the bottom in time!

3. Floc is unpredictable. If you want to try it, order some PAC (poly-aluminum chloride):
GLB Pool & Spa Products 71408 1-Quart Drop n' Vac Pool Water Clarifier @ Amazon
but then use the white bucket test to make sure it's gonna work, before you dump it into the pool. This is one case, where a little 'too much' may be better than not enough, so you may want two bottles.

However to use floc, you will EITHER need to vac to waste OR make SURE your filter is working well, and won't blow the floc THROUGH the filter. (If you have a low speed, that will work, if the filter is full of sand.)