I personally would not add copper in any form to my pool...copper is what turns blonde hair and fingernails green, and stains the sides of pools. It also makes your water chemistry much more of a pain to maintain.

Keeping adequate levels of chlorine in your water will keep your pool clear. If you would post numbers (via drop-based kit, not test strips) for total or combined chlorine, free chlorine, pH, alk, and calcium we would be happy to see if we can identify what's causing the water problems you're having. Is the water green? Cloudy?

Janet