Thanks Waste for answering. My pool is a 30' round, and we do have a shop vac. The bottom is sand and will need retroweling. I noticed today that the moles haven't wasted any time and have started tunneling under the pool and heaving up the sand. I know their are people who care about animals-and I do too, but when it comes to mole, there's no love lost here. Those animals have cost me hundreds of dollars with their destructive ways and they're nearly unstoppable. I'm wondering if I should check the level from one side to the other to make sure it's not to far out of plumb? Is a laser level easy to use and rentable?