Trevor Janvier in Canada is having fun with his upflow style algae scrubber, which is easy to DIY:

"20 days... that's pretty wicked growth, and it seems like my glass algae has lessened. The first picture is 6 weeks ago the next is 4 weeks ago, and last are today, all are 2 weeks intervals with 24 hour lights. phosphate is between .06-.19 and I only clean the glass about once every two weeks and it takes only a min or two. best thing I have done for my tank"