I'm having a very bad hair algae problem

[Schism]

Manual removal mixed with increased water changes and maintenance and keeping an eye on how much your feeding will conquer with some time and persistence.

 

[Mr. D]

Mine was worse. Cut back to spot feeding. Cut blues and whites 1hr each and 10% water change every other day. Also cut and pull it as you siphon out water during changes. In 2-3weeks should see huge change.