I Just received my new sand filter pump but sand will not arrive until tomorrow. I'm desperately needing to vacuum to waste because there's a lot of debris from an insufficient cartridge filter pump that the pool came with. My daughter is supposed to be having a pool party tomorrow for her 7th birthday. Is it okay if I set up the pump without sand just to vacuum to waste? I'm new to all of this but everything I've read leads me to believe it will be okay as long as I don't use any other setting without the sand but I would hate to mess up my new pump. Any advice is greatly appreciated!