I am ready to open my in ground pool. It has been uncovered all winter with the pump running when weather was freezing. I kept all leaves out. cl 3.0,ph 7.6,alkalinity 70,cya 40. My question,is it better to vacumn dirt to waste or can I use a stocking in the skimmer to catch it. I know if I vacumn to waste it will probably throw all of my chemical reading out of line because of having to add water as the level will drop as I empty it. I really do appreciate any help. THANKS again.