| | Re: Juwel 180, Long'ish Brown Aglae Threads. Inc Photos
Hmm, give it a bit of time to go away. The most effective way to kill it is spot treating which is why it goes away within a few days in other people's tanks. Since you are 3x dosing the water column it will be more dilute when it reaches the BBA and so will take a longer time to kill it.
Perhaps its the color of the photo but the algae really does not look like its growing well. The third picture in particular shows the different color of the algae from the tip to the base. The tip is a gray color and the base is a darker green-red color. When BBA is gray it means it has died and is in the process of decaying. The green/red color usually means it is damaged. Healthy BBA is a very dark green color, almost black.