I'm bothered by the FC of .5 and the CC of 1.5--which means there's definitely something growing in your water if you are running the test correctly.

If you keep getting an FC of .5 and a CC of 1.5 then you should shock your pool's FC up to 15 ppm and keep it there for a couple of days. If you are not running the test wrong then you DO have an algae bloom and you need to kill it, now. Shocking it this way will show if you are running the test wrong or DID have a problem.

If, in fact, you have a metal problem, you can deal with that after you are certain you don't have an algae problem--which means at a minimum CC must be 0.

If, after that, your pool is still green and clear, we can investigate metals in the water.


To summarize:
1) Let's start by ASSUMING you ran the FC and CC test correctly.

2) Then you need to shock your pool to 15 and keep it there.

3) When (if) CC now drops to zero you had something growing.

4) If your pool is STILL green we then check for metal.