The first time I put CYA in the pool (in panty hose, in skimmer), I placed about 3 lbs in in the evening and by the next morning it was all gone. The 2nd time I placed about 1.5 lbs the same way in the morning and by evening it was all dissolved. Those two were out of the same container. Yesterday at ~noon I placed 2 lbs in - same brand but new container- and as of now 8am I would say only half is dissolved. Does that seem odd?