I spent all day yesterday and today going over the Pool School. I am looking to open my pool this weekend(this is my first time ever), and see that testing the water is a must, so I wanted to get a good kit. I see that the TF-100 is highly recommended. Is their anything else that is recommended over and above this kit?
I see they have add-ons for an XL-kit, and a magnetic stirrer, are either of these things needed/very helpful?