If your pool is green it's probably algae-infested already--metal remover isn't going to do anything.

With a CYA of 100, and water getting green, you need to shock your pool up to 25ppm of chlorine, IMMEDIATELY--as soon as you see this post....don't read any farther till then...

Now that you've raised your FC to 25ppm, you'll have to keep it there--check 3x/day and adjust as necessary until your pool is clear and blue.