Have a variable speed pump motor with 3 settings. Doe it make any sense to have different settings for whatever I want the maximum, minimum, standard RPMs to be? If so, when would I set each? meaning would I want the maximum to be when the pump first comes on, or later, etc. OR: does it make sense to make all 3 settings the same? What might be most cost effective? The pool does have a heat pump type heater in use.