I've been getting some algae here and there, so I opted for some type of chaeto or algae scrubber rig. I just picked this up from a buddy of mine. It's kinda like a media reactor with racks inside to hold any type of macro algae you like - I'm going with chaeto. It also has a submersible LED light. I'm going to try to grow some algae from it. Still need to get tubing and a pump to set this bad boy up.
Here's a couple of pictures: