I do remember your username and remember that I helped you before, but I work on so many different threads and with so many different members/pools that I cannot remember the specifics about your situation.

If you let the FC drop to 0, then you invite algae. You will need to go back to running your pool at shock level (based on your cya level) and try and hold it there to get rid of the algae. Run the pump 24/7, brush the walls and floor of the pool. Test and add chlorine as many times a day as you can and each time take it back to shock level. Take it up to shock level this evening. Test again early in the a.m. When you can go two days with no more than 1ppm of cl loss overnight, you can let it drift back down and then do not ever let your cl drop below 5. It may take awhile to filter out dead algae if that is what is causing the cloudiness. Repost with a full set of current water testing results when you have had two mornings in a row with no more than 1ppm of cl loss and tell us how the water looks at that time.

Also, if you have brown stuff settling on the bottom, can you slowly (so as to not get it back in suspension) vacuum to waste and get it out of the pool?