After reading some posts on where to set drains (i.e. drain vs. skimmer) I am wondering if we have been setting ours wrong all these years. Our pool has two drains in the deep end and one skimmer at the shallow end. There is one valve that lets me set one or both drains open or both closed and one valve to turn skimmer on or off. I can't turn drains part way on or off. I can close one or the other and adjust the open one as I wish. I have always left them all wide open. Now I'm wondering if I'm getting enough "skimming" action. I might add I built an aerator like I saw on here. It's connect to middle return to keep the surface stirred up and moving. By the way I have three return jets along the wall opposite the skimmer. I was always taught "still waters run deep" as far as circulation was concerned. Any thoughts or suggestions ?