You need a telescoping pole and a net. You will definitely need a vacuum of some sort. You can either buy an automatic one of some type of just a manual vac that you attach to the pole. You'll need a pool hose.

One very important thing you will definitely need that hasn't been mentioned is a good test kit. The only one we recommend is the Taylor K-2006 or 2006C (better value). You can order it through the Amazon link in my signature. Only buy if the seller listed is Amato Industries. Some other sellers are substituting the K-2005 which is not the one you want.