This shows the result of a single dose of APT Fix via the drain-dose method. By Day 2, the hair-algae has lost some of its green color. By Day 5, all the hair algae has been deactivated. You can remove it completely using a fine brush.
This shows the result of a single dose of APT Fix via spot-dose method. By Day 2, the inactive BBA would usually change color to red and/or white. These would either decompose, or serve as food for algae-eaters and other microorganisms. By Day 7, the leaf is now mostly free of algae.