Yes, power will change as it gets dirty. According to brs, power consumption goes down, which is counter intuitive. Power monitoring will allow you to see the change, but the apex won't do anything with that information unless you program it to. You can program it to alarm once it hits a certain value, or whatever you like.If my return pump is slowly getting dirty over time and pushing less water - is that a condition that the Apex will detect via power monitoring? Will the pump start to use more power as it gets dirty?