Sounds like you precipitated a bunch of calcium carbonate.

Is there a reason you haven't been reporting calcium hardness levels? In this case, that's a pretty important reading.

Regardless -- if your water is clear yet, boost the chlorine and then turn the pump off overnight. If the calcium settles, try carefully vacuuming it up -- but make sure it doesn't shoot back into the pool. If you have a sand filter, you can add DE powder to the skimmer, before vacuuming. (If the DE shoots out -- your filter needs work!)

Anyhow, if the filter won't catch, vacuum to waste. If the pool gets low (watch the skimmer!), stop vacuuming, turn the pump back on, refill the pool (over fill if needed) and then try again later.

. . . membership updated.