Water circulating before testing?

[aylad]

If your CYA is actually in the 30-40 range, then your required chlorine level is 3-6, with shock at 15. You shocked it a great deal higher than that, but it's okay, it didn't hurt anything, it just cleared the bloom up a little faster. In that case, I would not swim in it until the chlorine gets below 10--and then I would wear an old suit just in case of fading. As far as letting them swim while it's cloudy, that's a judgement call that you'll have to make--the cloudiness is from dead algae, which won't hurt them, and possibly made worse by high calcium, which also won't hurt them--but if it's cloudy enough that you can't see somebody that's in deep water and in trouble, then I still wouldn't let them swim until it's clear.

If your CYA is in the 30-40 range, you could probably get away with using a trichlor tab in a floater for just a little longer. It will help drive your pH down, and keep your chlorine up, but it's going to add CYA. If you're not sure, and the CYA may actually be up in the 90s like you originally posted, then I wouldn't use anymore trichlor because the stabilizer is going to get too high to keep the pool clear. IF the tab you've had in the floater is cal-hypo, then you definitely don't need it because your calcium is high enough already--and it's possibly contributing to your cloudy water problem.

Janet