Planted Tank Guru
Join Date: Jun 2009
Location: Huntington Station, NY
Do a water change.
Drop photo period to 4 hours on, 2 hours off, 4 hours on.
Photoperiod will help within a few weeks, but algae will still survive.
Removing plants and treating them in a bucket would work.
Turning off filters/airpump and directly treating with peroxide would work as well.