I have run my fish tank for 7 1/2 months already, and i keep experiencing algae bloom. I am running a low tech Planted tank (dosed regularly with excel and less than half recommended dose of ferts). So far i know Light intensity and duration, feeding amount and frequency, and water changes affect the way algae bloom. I'm running 2 T5 light bulbs, with one 16w LED. I tried reducing light up to 11 1/2 hours. I kept both on since if one is off, the tank looks dimmer. Lights on at 9:00am and off at 8:00pm (sun goes up at 6am in my place) My Tank is close to the window, but it is curtained with an extra covering I reduced feeding frequency so feeding goes once every 2 to 3 days. I tried changing 50% of the water before but the algae keep growing back. I haven't seen a day with very little algae. I don't think scrubbing the glass wall is a good idea. It turns the water greener.