Ok so I have a 3 gal betta tank set up in my work cubicle. The tank has been running for several months now. A few months ago I had started a thread about a brown algae problem I was having. Well some green algae started to grow as well and I decided to pick up a snail at petsmart. The snail cleaned house on the brown algae but will not touch the green stuff. Now the green algae has taken over the tank coating everything. There is a solid coat of green on the sides, fake plant, fake stone bridge, and all over the rock floor. I spent an hour the other day getting the sides with an algae brush and rinsing off the decorations so it looked decent. I stirred the rocks to kick up algae into the filter but didn't want to wash the rocks and ruin the cycle. Anyway, I covered the tank so it was pitch black over the 4 day thanksgiving weekend and came back to see the algae making its way back up the walls so the "black out" didn't do anything. This tank also never sees natural light and only gets indirect fluorescent light from the office. Anything else I can do to get rid of this next to trying chemicals? It's too small for algae fish I assume and I don't trust the betta with one anyway.