mas985, so, your whole issue on main drains have everything to do with entrapment, and nothing to do with circulating water?

I have seen almost a "fanatical" take on stuff, and for being a hydraulics guy, I can't see why you are so against them. If it is fully because of the entrapment issue, fine. But, I am almost getting a feel it is like the "right to life" issue... Either you are pro-choice or pro-life and there is little middle-ground. You can definitely tell when reading certain technical articles on subjects like the main drain issue that there is a hard "slant" towards "NO MAIN DRAIN!" in some of them. But, just like people against high-hp cars because of the high chance of killing yourself/others with it, or even those that are "green" about energy efficiency vs those of us with gas-guzzlers. (I have a 1000+ HP car along with a 750hp car and a large conversion van, so I am far from the "tree-hugger" type, yet I am far from wasteful in regards to saving energy where it makes sense, but with 8 people in my household, we are major consumers of energy, food, gas, etc, etc) I just want the best available options for the best outcome. I hate being told that just because someone got hurt with something that I shouldn't do it, since in a lot of cases people get hurt due to ignorance, stupidity, lack of parental responsibility, etc, etc... All things that are avoidable if people use some reasonable thought processes.

In regards to having the pump on low 24/7, I am referring to the fact that I figure we will have high bather loads in the pool during the summer, thus with it running on low longer it would be better overall. But, that is just an initial thought and I will modify the low/high speed schedules as needed with a outlook towards shutting it off for as long as possible when it makes sense.