This is from the part on BGA:
"Blue-green algae is a form of bacteria and not an algae. It will cover a large surface area if not treated immediately."
I would hope that people find a better list of causes of BGA. You really have to change the causes of the BGA before it will really go away permanently. BGA exists in the source of my tapwater.
As I said earlier, my problem was too much dissolved organic compounds in the water, and vacuuming the gravel a couple of times solved the problem.
I think the tank should then be treated as soon as possible with one of the different antibiotics like Maracin.
Sorry for repeating, but it is imperative that you find the cause(s) making the BGA bloom before trying other methods, and then use Erythromycin.
I struggled for two months or more with BGA, and I'd like to help anyone I can take care of it permanently in less time and with less losses.