Hello all - I have just purchased a house with a pool. This house and pool were built in 2007 and purchased by an NFL player as a second home. This home has never been lived in and i have to imagine the pool was not taken care of. I have been monitoring all chemical levels and they are well within safe levels. Recently i purchased a Polaris 280 cleaner and keep finding large amounts of clear/blue sand like substance in the bag. I fear this is plaster from the bottom of the pool. Has anyone seen this before? Can anyone tell me im wrong and not to worry about it? What damage can i cause by running the pool for another month or so before having it drained and inspected?