With drenching rains in my area yesterday, I had to remove some excess water via backwashing several times. I looked at it as a positive to allow an extended backwash to really clean out my sand filter.
This morning... taking out my dogs, I entered the yard and glanced at the pool. I had one of those "my pool is so clean, I can barely see the water" moments... until I suddenly realized that I could not see the water!!! My first thought was that I had somehow left my valve open to backwash, but going to my equipment, I found that the hose from the filter to the return had popped off at the return.
My pool had drained to the bottom of my return. My pump was running all night, both pump and skimmer are empty. There was very little standing water in the area, so I am assuming this happened many hours ago. I am refilling now and hoping for the best regarding my pump.