algae growth

[reefermadness31]

I recently introduced the filter sock to my sump. Less than a month later I have heavy algae on my glass and I clean my glass up to 2-3 times a day.

What can it be?
TIA

 

[Wryknow]

Are you cleaning your filter sock regularly? Is it a realtively new tank?

 

[jess1111]

Have any of your procedures been different since the addition of the filter sock?