Thanks for everyone's help while I am away

. Here is my (remote) theory, having not seen it...
I had been skimming very dry for a long time. I started skimming wet a few weeks ago, but it required a number of adjustments to the gate valve to get it skim wetter (set in one place, it would start skimming heavy, then back off, so I slowly adjusted it over a week or so to skim wetter. When the tube came out of the ATO pump, the level in the sump dropped, causing the skimmer to suck air. Some friends came over to check on the tanks, cats and ferret and noticed the noise from the skimmer and realized there wasn't enough water, so they added more RO/DI. I have noticed that after the skimmer is shut off and restarted, it tends to go nuts for a minute or two, requiring a gate valve adjustment to stop the bleeding (much more often when it is cleaned than when it is just unplugged and plugged back in, though). I assume that sicne it was running with so much air, that must have somehow effected the hydraulics of the skimmer, causing it to over flow the reservoir when it had enough water again (haven't put one of the shut offs on the reservoir because so far, just having the hose submerged has always killed skimmer production). I guess it just went too nuts for the subemerged tube to stop the flow, though... How the salinity ended up high, I haven't yet figured out... I would have expected low. I guess it is a good thing the tube popped off the ATO pump, in retrospect, or I would have replaced ~30 gallons of salt water with RO/DI. Jenns reports are that everythign looks okay aside from cyano blooms in two other tanks (hers and the 120), likely due to higher temps than we expected (heat was set while we were away, not the air).
Today's problem concerns me. Jenn said the water is leaking out where the flex hose connects to the PCX 55. It hasn't leaked there before, so I may have a cracked volute or something. I'm glad Murphy got confused on this one

. I guess he was like a kid in a candy store-wasn't sure which tank to mess with first with too many choices. He hasn't come around in a while, so I guess I can't complain about him too much

. Two more nights in (Old) Montreal and I'll be home...
Thanks again to all who helped, esp. Mimi and Daniel. I think those two housecalls/PM's/however you made contact gave Jenn more confidence.