Cloudy and green is algae. You need to raise your chlorine up to shock level to kill the algae. Shock level is based on your CYA reading. Please see this chart for more about the relationship between CYA and chlorine:> http://pool9.net/cl-cya/

You want to keep your chlorine at that high level until:

1) You can go from sundown one evening to within an hour of sunrise the next morning without losing more than 1ppm of chlorine
AND
2) You have no more than 0.5ppm of CC

At that point, we generally recommend that you maintain the high chlorine for one more day for added insurance and then let it drift down but always keep it between the minimum and maximum needed levels per the chart above.

HOWEVER, since you fill from a well, it would probably be a good idea if you do a bucket test to check for metals before you shock the pool. Directions to do so are here:> http://www.poolforum.com/pf2/showthr...est-for-metals

Let us know the results of your bucket test and then we'll help you proceed. Keep your pump running 24/7 while you are trying to clear the pool and backwash your filter as needed.