I'm sorry Hoppy that is really not true IMO and impossible to even say. Are you saying co2 is an algaecide like Excel?
BBA comes about due to a co2/lighting imbalance also fluctuating co2
Its been proven that sufficient co2 in retrospect to your lighting and avoiding fluctuations will greatly reduce your chances of getting it and also can cause it to start disappearing.
Though in my experience i don't think the correlation is what we think... Examples my 125 i had co2 going 24/7 running two 80 Watt bulbs at a time and still got bba even after raising the lighting,my co2 ran out and lost a ballast, still running two so really lighting didn't change and i have little to no BBA
Another example my 10 gallon sponge filter with a small aquaclear, no co2 and a single t8 on top... No bba, or algae of any kind for that matter, yet have dropped random plants in and it grows about anything.... Even dropped a Java Fern with BBA in. The BBA is gone... I can't even begin to speculate
Sent from a dark corner in my happy place