algae question

[fatpuffer]

My tank is a 40 gallon wide tank with 40 lbs of live rock. I have been having a brown algae bloom but it is slowly but steadily subsiding. In its place are these green hair algae.

what is the best way to get rid of the green hair algae? I have a coralife power compact 50/50 96 watts. It is on for about 9 hours per day.

Should i cut back on light until it goes away? I have no corals, fish only.

Thanks.


jonah