I've had a Blue-Green Algae (cyanobacteria) issue in my 55g tank for several months now. I'm still not sure how I got it to begin with but I had been battling it mostly with thorough tank cleanings once (and sometimes more than once) a week with the water change. The other day I got a little fed up.
I'd done some reading and decided that we'd try and see what a lights out situation would do. I went three days lights out (this seemed to be a moderate length) and have just now turned the lights on as I normally would on day four. I haven't seen the tank this free of the BGA in MONTHS! I dunno if it'll last, and any suggestions that anyone might have to make sure it stays that way would be appreciated. But, I just felt the need to check in.
Temp is about 81F. T5 Coralife bulbs. One 6700K Daylight the other their "Colormax".
BGA is caused by excess organics. If you keep up your water changes, it should help keep the BGA out. I dosed maracyn one to kill my bga and i went without BGA for almost a whole year before it returned. Once u kill it takes a while to come back.
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