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Just curious, I recently (about a month ago) added pressurized CO2, on 1 hr before lights in, off 1 hr before lights off, to a 2 wpg moderate to heavily planted tank, dosing ferts on a slightly decreased EI schedule due to not real high light and not super heavy plant mass. It took about 2-21/2 weeks to get CO2 stabilized at about 30 ppm. Just yesterday I noticed several small tufts of BBA on some driftwood. I know BBA generally stems from low or fluctuating CO2. Could those few tufts be due to the increasing CO2 for those couple weeks? I plan to spot treat with excel and leave things otherwise alone as they have pretty much stabilized. Not real worried about it, more wanting to understand the mechanism....Thanks!