Yesterday I decided to open the pool, but before I could fire things up I needed to patch the sand filter where it got cracked last year trying to move it back up on it's base. Patching went easy, but came out to check on it before bedtime to find water all over the patio and the sound of the pump running dry. As I walked past the pool I could tell the water level was low, about 2,000 gallons low.
It's looks like the pool cleaner sucked up enough dirt to clog up the filter and cause the patch to completely blow out, creating a little wash out next to the equipment.
So looks like I'm ordering a new sand filter this week, but could have needed a truckload of water too if the bottom drain had been open. Will also give me a chance to re-pipe it all and pour a new "level" base for the equipment.
We're supposed to get a bunch of rain this week, so will have some 4" pvc running from the downspout over to the pool for a free refill.