Can and/or should I run it 18-20 hours since that is what it's made to do....modified it some from when PB left it at 2800rpm for 12 hours......quite a big spike in bill........went to 2200rpm for 15 hours-that gave me identical water turnover rate......thinking of doing 1700 rpm for 20 hours (identical water turnover rate)........suggestions? anyone doing this already?
