1) Reduce your lighting duration
2) Reduce your feeding and
3) Purchase and use seachem flourish
and dose Seachem Excel at the recommended rate and
2) dose Seachem Flourish at twice the recommended rate for two weeks.
If anything, if you dont want to purchase seachem products reduce the light duration , do major water changes. If the algae doesnt come off manually from scrubbing, you're gonna have to trim all those leaves that are infected .