Sooo... I figured out the answer to the skimmer mystery - I opened the jandy valve on the pump suction side and what greeted me but a rubber plug which appears to have been sucked through the line from the near side skimmer! It was completely blocking that side of the valve! I have no idea how it got there or how it managed to make it all the way through the line, but I removed it with a pair of pliers and everything works just great now!
Two more gallons of bleach and I should be on the high side of my SLAM target for another night. The polaris keeps finding sand on the bottom so I'm suspicious that there's a broken/cracked lateral in the filter, but I'm not positive because I don't see sand shooting out the returns.
Definitely looking much more like "pool" than "swamp" now, but still nothing even remotely approaching "sparkling".
Thanks everyone for you advice
Two more gallons of bleach and I should be on the high side of my SLAM target for another night. The polaris keeps finding sand on the bottom so I'm suspicious that there's a broken/cracked lateral in the filter, but I'm not positive because I don't see sand shooting out the returns.
Definitely looking much more like "pool" than "swamp" now, but still nothing even remotely approaching "sparkling".
Thanks everyone for you advice