DIY Algea scrubber build please share ideas

[Race3370]

Hey guys I have a 56 gallon tank and was going to buy and Algae scrubber but they are just way to expensive. I am running a refugium, but really want an Algae scrubber to help. Has anyone built one? Any instructions or ideas would be greatly appreciated.

 

[mfdrookie516]

http://www.aquariumadvice.com/forums/f20/algae-scrubber-basics-163817.html