Too good to be true? Normally I add approx 2 lbs at a time in a sock in my skimmer. This time around, I switched to a different brand (Aquabrite Chlor-Sta) and hung the sock in front of my return. This brand is perhaps slightly more granular, but not by much. There was a white fog trailing out from the sock like a comet's tail, and it didn't take long at all...1 hour later it is mostly gone. In front of the return, there is a lot more turbulence and the sock gets buffeted around a lot more. The sock is not compromised in any way, no undissolved granules escaped as far as I could tell. Typically I see it dissolved in the skimmer after 24 - 48 hours.