It's a long shot, but there was someone else recently who couldn't pass the CC test for weeks. Turns out he had algae growing in his sample bottle!passionsrlz said:No light in pool. I scrub and scrub. I almost pass but don't. It's been a month now but what I didn't know is I was working with a bad pump that was dying. I replace the pump and water cleared in 3 days. Just can't seem to get totall over the hump.