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For what it's worth, I wasn't calculating anything much. I was just going from experience that 3 T5's that close to the surface would make an algae fest in my high tech tanks. I'm pretty certain it could be done with careful tuning but I'm too often late home or absent for a couple of days to...

For me, that's BBA, as stated above, turn down the lights. I'd be shutting down one of the T5's and dropping the photoperiod to about 4-5 hours and then building back up again. For reference, for cyanobacteria, erythromycin will work, and will work well. There's a big however though...

I'd call that one a Rhizocolonium. I've struggled with that for a time, but good CO2 and flow cleared it.

I'm not a fan of the light on the ebi. Mine faded considerably within 6 months and the bulbs are a pain to change (dremmel helps), so if you have the same bulb as me then there is an option to hang in there and wait for it to fade. Personally I'd just replace the light, but I think that's just...