It doesn't take long, if you know what you're doing. You'll need a reliable set of test results (drop-based kit, please--no strips!!) so that you know where you're starting from. You will definitely need salt and CYA, and a good test kit (see the link in my sig). You'll also need some plain, unscented bleach, or chlorine granules to chlorinate with while you get your chemistry straight. Besides that, you use Borax to raise pH and baking soda to raise TA if you need to, but we won't know that until you run a set of tests on your water.

Welcome to the forum!!