Here is a water chemistry question from a non-chemist pool owner. My pool pump only circulates the pool contents for eight hours a day normally starting at 0900. We had a hell of a storm yesterday and two inches of rain water got dumped into my pool, naturally after I had just added water lost from evaporation and shocked the pool with three jugs of chlorine. So now I need to pump out the extra water. The question for you folks is this, with the pool water standing stagnant over night do the chemicals in the pool water settle to the lower layers of the pool volume, or rise to the upper layers, or just stay mixed? You know kinda like salinity layers submarines use to hide from surface SONAR. What I am getting at, is should I wait for my pump to circulate the water for a while before to mix everything up before pumping it out since I'm gonna lose anyway? If the chemicals settle to the bottom, I could shut off my main drain located at the bottom and use the skimmer to remove the water from the top. Or if they are at the top, shut off the skimmer and use the bottom drain. Does any of this make sense? Chemicals are pretty freaking pricey these days as pool owners know. So folks, what do you smart people say?