#1) The most important thing is to get a good test kit. We recommend the Taylor K-2006 (or K-2006C - better value), you can't buy it in a store (that we've seen). If you log out then navigate to Forum->Testing and Adjusting Pool Water Chemistry->How to Get the Right Testkits for your Pool you'll find links. If you buy through the link, the pool forum will get some coin to keep the lights on.

#2) Read, read all you on the pool forum and at poolsolutions.com. Get familiar with the best guess chart.

Any questions, let us know.