Jenn,
Welcome to TFP and sorry that you found us with a green pool. You're not alone though. Keep up the great work and your pool will look great soon! After that, maintain the pool with TFP methods and you'll have a fantastic pool from now on. We use dirt cheap chemicals from big box stores. We have volunteer experts that are here to help you with any issues. As you already know our methods work and are used by thousands. Also, we sell nothing. So the advice you get is never conflicted to get you to buy something.
Chris