OK, I've tried "everything". Air Bubbles in the pump basket (at least a 3 inch bubble of air at top of dome), bubbles look like they're coming from the o-ring (but no cream gets sucked in), tiny air bubbles out of every jet. I removed basket dome clamp and just primed with lid only (easy to run shaving cream around edge), no change. No vortex in skimmer. Tried the shaving cream trick on every suction joint, around the o-ring, every screw fitting, drain valve... nothing gets sucked in (except air from somewhere I'm not seeing. Air with or without cleaner running. All I can think is crack underground, but I would think I'd start seeing mud. Pump basket loses 50% each night, takes about a minute to prime, but does prime. Equipment is above water level.
Any other tricks to find a suction leak?
There shouldn't be anything connected to suction except the one 2" drain line and one 2" skimmer line, right?