I have the worst problem with brown algae. Started a few months ago and I don’t know what to do. Tank is a 75G stocked with cichlids. Filtration is an Fx4 running purigen and carbon. I also have a large sponge filter running in one of the corners. Power head in the opposite corner for surface agitation. I recently moved a few weeks ago and basically started over on this tank with the exception of the filter. New substrate and decorations. I did use some of the old water but not much. The tank is mostly clear but this algae is starting to come back. Lights are only on for a max if 10 hrs a day. Water changes are done 2x a week. Any thoughts??
