stopped by the pool store today to pick up some stuff and popped the question of "How do I determine the proper rpm of my pool pump"...The guy told me "Low if it is a variable and let it run longer". When I explained it was a pentair and you could set it in increments of 10 rpm's he told me those are terrible and I should buy a Hayword...So im slightly confused. I have it set to 2500.....No idea how many times im turning my pool and if that is considered low, medium, or high. I know its at least enough to keep the pool clean since I havn't had any problems in the past (battling algae right now due to pool equipment being turned off for almost a week), but I don't want to be running it significantly more than I have too. My electric bill is consistently 500 dollars in the summer. Had it set 8 hrs in the summer and 5 in the winter (Southern California weather). Anyway, that was the setting it was on when I moved in a year ago so I just lived with it..now that i've found this site and trying to learn more, I'm trying to figure it out. Pool is a roughly 15k gallons/salt water. I just read the section on how to measure your pool size so I'm going to work on that since these are the same people who read my layout plans from the builders in 30 secs. and gave me the size.