Welcome Jsf, truly no dig intended. We really want everyone who comes to this site to have a trouble free pool. It can be difficult to convince people to spend more money for what seems to them like an expensive "overkill" test kit. We're so insistent because no one, NO one, will care about your pool like you will.
TFP does not make money off test kits, if we did, we wouldn't recommend the K2006C that you can purchase from Amazon. We just know that kit and the TF100( from tftestkits.net) are the only kits that have the correct reagents to give you accurate, repeatable results.
Why would you want to swim, or have your children swim in unknown chemical soup? We basically recommend cheap well known products: liquid chlorine, muriatic acid, cyanuric acid and calcium, all of which you can buy at Walmart or home center stores. Think of your expensive investment, we care about you getting the longest life out of your finish and equipment!
I have followed tfp protocol since day one with my pool. I have never had algae, and I know exactly what my grandchildren are swimming in and that it's safe. I test chlorine and ph everyday which takes literally 5 minutes, all other tests are monthly.
It's much cheaper to invest in the kit, which should last 2 seasons, than to buy all the overpriced chemicals pool stores are pressured to sell. Nothing wrong with them trying to make money, but not at my expense!
Do some reading on the site, not just pool school and other articles, read the forums and you will see the proof that this method works, if you follow it, it's foolproof.
You'll also see threads over 10 pages long, full of people falling over themselves to help others have a beautiful enjoyable pool. No one is pressured to donate, it's always much appreciated, but donate or not, everyone gets the same excellent help.
We hope you'll drink our pool-aide!