I seem to have found the green water again. I shocked the pool and went out of town for about a week and when I returned I found that the pool water had returned to about FC=6 which I thought was ok. I did put in a bottle of chlorine because I had some green color on the steps. I brushed the pool after getting all the leaves off the solar cover and went for a swim later in the day. This morning I woke up to a mildly green tented water. I guess the organic mater on the cover started a bloom and I turned on the heater also to get the water up a bit. So I back washed it and dumped another bottle of bleach in. Do I need to shock it again or do you think it will clear up?