There is a lot more to know about your water than just chlorine and pH. We always recommend that people buy the Taylor K2006 or 2006C test kit as it is the best one out there. It is not available locally but you can get it through the test kit link in my signature above. (Takes you to Amazon.)

I think you have your colors reversed in your description above; pH is a pink scale and chlorine is a yellow scale in an OTO/Phenol Red kit (yellow and red drops) that I assume you have.