being a pool owner for only a few years it takes a new trick each year for various problems, this year was a cover that was never put on I know I know terribly wrong and im paying for it now pool was a swamp with 15-20 big batches of leaves in it water was green thoughht about draining and starteing over but i thought i would use chemicals first. i drained about 3000 gallons of my 12000 pool (above ground ) filled with water and began to shock my still green water . had water tested to see where to go first needed calcium needed stabilizer needed PLENTY of shock 4 or 5 bags clcium hypo 4 or 5 bags shock now my green water is just milky/ cloudy pool store said to keep shoking doubling and doubling till its clear how long should this take, filter is runnig constantly backwash daily