The tarp does not seem to waterproof - as i tried to pump off the top portion in a previous years and all it did was reduce the water level - my pump is a small utlity pump that I picked up at the hardware store. When we had the liner replaced last year I had them install a double track , so when I can retire the safety mesh cover, I will get a solid vinyl cover for winter.. Our Golden Retriever thinks the safety cover is her personal trampoline, "Look I can jump and get wet at the same time!!".... When I I would have the pool professionally opened - they would have a much larger faster pump\milk crate contraption dunked into the pool and brush everything towards that.. then the team would drag the tarp out.. and the pool would almost be clear when they left..