BBA ever present - what am I missing?

[Hoppy]

Reduce the light intensity below 40-50 micromols of PAR at the substrate, and BBA becomes just a minor nuisance. I doubt that we can ever totally eliminate it, so we can ignore its threat, but for reasons I don't really understand, if you can provide all of the CO2 the plants need, and not be stunted from a shortage of carbon, BBA tend not to be a problem. With low light, the plants don't grow fast enough to need much carbon, so BBA isn't a big problem. With high light it is hard to get enough CO2 in the water to meet the plants needs, so BBA is a continual threat.

Someone else will have to figure out why that could be true, but it has been found to be true by a lot of people. When someone comes up with a different way to avoid BBA problems I will be one of the first to offer congratulations. (And, it won't be the first time I was wrong.)