If the water is now totally clear, then you can test for chlorine at night, then test again in the morning before the sun hits the pool. If there is 1 ppm or less chlorine loss, then you can let the chlorine levels drift back down--but how far will depend on a current CYA level. If you haven't started adding the CYA, now would be a good time...I would follow label directions to get the dose for 40 ppm, then add only half of that to an old sock and hang it in front of the return so it can start dissolving. It can take several days for the CYa levels to show up, so I wouldn't even test for it for 3-5 days.

Janet