You really need a better tester. It will test everything you need to know including CYA. The one we recommend is the Taylor K2006 or 2006C (better buy). Test kit link is in my signature.

CYA is kind of like sunscreen for your chlorine. It keeps it from disappearing especially on hot sunny days. Your needed chlorine level to kill algae is based on your CYA reading.

If your pool is still not clear, keep adding bleach as Ben suggested and run pump 24/7.