So I had a small onset of greenwater, or what I believed to be the onset, so I blacked out for 2 days and the water cleared right up. I also cleaned and changed my mechanial filter media and packed it really tight with some of that blue coarse pad filter stuff, im sure you all know what I mean. And also packed my second tray full of poly-fil really tightly. I uncovered the tank and started my lighting at two four hour periods a day seperated by about 5 hours. The cloudiness came back today, one day after the uncovering, but not badly. Is the staggered lighting a bad idea to come back from a blackout or just cut the light down to 8 hours straight? I usually run the lights for 10 hours per day. Im sure the bloom is due to my being a newbie with ferts, but Im getting it down. Also, on another note, my problem seemed to arise about a week after removing my glass canopy and leaving the tank uncovered. Could that have increased light intensity and caused the problem?