Just replaced my pump on Monday (laboring on Labor Day) and it's appears to be running fine. Now my pool level has dropped 1-2 inches and the pressure gage on the sand filter is reading zero. I cannot find any leaks (i.e. no wet areas) anywhere around the exposed plumbing, filter, pump etc. My new pump is running 24-7 right now as I'm slamming my pool. Any thoughts?