First Results from PS234 Kit

[waterbear]

Is your pool plaster, fiberglass, or vinyl? If it is plaster then you need to raise your Calcium up to about 200-300 ppm to protect the plaster. If you have vinyl or fiberglass then you are fine.

With a CYA reading of 80 you should be running your chlorine at 5-10 ppm for normal sanitation and shocking to 20 ppm or slightly higher. See this thread
http://www.poolforum.com/pf2/showthread.php?t=365

This is the probably the explanation for the amount of CC you had on your first test. At a FC of 4 ppm there just isn't enought available (and unstabilized) to handle the organics in the water.