You need a reliable test kit. 'Guess strips' are worthless. The test kit that we think is by far the best is the Taylor K2006 or 2006C (better buy). Not available locally but you can get it through this link that takes you to Amazon: http://pool9.net/tk/

Disconnect that electrode. Contrary to popular belief, it is not copper and not chlorine that stains things and turns light-colored hair green!