Thanks for welcoming me into the forum. I have been reading some of the already posted stuff but I want to start off on the right foot. The pool was built in early October of 2020 and basically closed after completion. The pool builder opened us up on Saturday. I am getting the feeling that what my pool builder has told me to do with my pool water (add these chemicals every week) and what TFP recommends are quite different. He just handed me the stuff and said just do this, this and this. So being inqusitive I starrted looking for my own answers and here we are.. I am ordering the TF-100 today. I have read the information in Pool School. I guess I just need a little reassurance from you guys that I'm on the right track. The pool builder never mentioned anything about CYA or FC vs CC or TA or Calcium etc.. Just handed me the chlorine and pH test kit and off he goes. Now, don't get me wrong these guys build a nice pool and have been a family owned and operated business for over 50 years in our area. So after getting the invoice for them opening the pool for me this first time.....I think i need to follow the TFP method I am just a little unsure about totally ignoring what the pool builder says. Any and all advice is welcome. Thanks in advance.