All the air pillows I so laboriously cleaned and inflated developed leaks and sank, so I had to buy another and deploy it on Sunday.
The hurricane had also peeled back the cover and dumped leaves in the water I so laboriously cleaned four weeks ago. I did my best to rectify this state of affairs but was so demoralized by this foul turn of events it was a sloppy job at best. There's four hours of my life I won't get back.
While lifting the pool cover, it became apparent that it was dotted with numerous holes which will let filthy rainwater in anyway. This also explains why the water level was very low - when I siphoned off the water on the pool cover I also siphoned off half the water in the pool through the holes in the cover.
So that's all right then.