Scoop out as much debris as you can. Then go ahead and fill the pool so you can start the pump and filter. Then, it is time to start hammering it with bleach. What volume is the pool? What type of filter? I'd also suggest going ahead and ordering a good test kit. There is a link in my signature line where you can get the Taylor K-2006 from Amazon which earns the Pool Forum a little money to boot. If you go ahead and order the kit, maybe it will be delivered by the time you close on the house. Take some pictures of the pool before you do anything. You'll be amazed after it is cleaned up that it could ever look so bad! Welcome to the Pool Forum!