Alright, i have done 2 things to my tank recently. About 2 weeks ago, i replaced a 20w NO light (which was a temporary light for longer than i planned) with a coralife T5 fixture. The other thing i have done is remove a HOB filter about a week ago. The filter pads were filthy and when i took the unit off for a cleaning i never put it back on. In the past week or so, the algae has been growing like there is no tomorrow. Tank has been set up for 8 months or so and i have never had algae growing like this. It's to the point where i'm using my magnet scrubber on the glass almost every day, and the sand and rocks are almost totally covered. The algae is the dusty kind, which just comes right off and blows away in the current. So considering that i have never had this happen since i started my tank, which one is the culprit?