With a CYA of 100 and a free chlorine reading of 0.5-1, yes, you are heading for a swampy green pool! Take a look at the Best Guess Chlorine Chart in my signature below. It shows you how much chlorine you need based on your CYA level.

Now the next concern is that your CYA may be much higher than 100 since that test can't differentiate past that point. Run the test again with a diluted sample. Take one part pool water and one part distilled water, mix, and run the test with this mix. Multiple your results by 2. If you still get 100, do one part pool water to two parts distilled and multiply results by 3.

Your pH is Ok at 7.2 but you don't want it any higher. Alk is fine.

It's much easier to answer your questions, when we know something about your pool. We often 'waste' the first few posts back and forth collecting information. So, please complete our new Pool Chart form -- it takes about 30 seconds, but will save much more than that.
Pool Chart Entry Form
Pool Chart Results
Also, tell us exactly what all you have been using chemical-wise in your pool. (Ingredients and not just "shock" or "pucks.")

One last thing, are you aware that the SWCG adds copper to the water? Copper is what stains things and turns blonde hair green. Most people think it is chlorine that does it, but it is copper. You can disconnect the copper ionizer from your SWCG and it won't hurt a thing.