I had a Brown Filament Algae Outbreak on my Mature Tank, couldn't figure out the cause. After a water change, I mistakenly overfilled. I decided to just let the skimmer pick it up. Algae started to recede, a few days later. So I just kept adding Saltwater, checking the Salinity, for adding RO/DI. It is working. BTW, I did not adjust my Life Reef skimmer, just raised the water level in my sump. Also I‘ve done water changes in the past for this algae, with no result.


