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Thanks! Lower down the intensity of white and red to 80 and increase the green to 80 as well. My water parameter is about same as yours. pH is 6.4. Photo period is 8 hours. CO2 comes on 2 hours before the lights and goes off at the same time. I don't run my surface skimmer 24/7. I have it turns on for 15 minutes, 4 times within 24 hours cycle. I dose NPK + Extra iron. What type of substrate are you using?