Either the BBA was lurking all the time and became noticeable because of improved conditions for it. Maybe it was the removal of the stand of Ludwigia inclinata cuba that provided more light, and less competition for nutrients.
Or, perhaps the BBA was really not there until it recently got introduced with a new plant, fish or snail.
I have never had BBA but I have received many plants covered with it. The bleach treatment has always eliminated it for me. There is a lot of talk now about BBA being especially sensitive to hydrogen peroxide. |