I had the same problem a month and a half ago. Its another tank that shares water with your tank that you use to gro algae that look like plants(Macros) to help export you nitrates and phosphates and also... to help you have a steady supply of pods. Say goodbye to your Cyano problems!!!!
I just purchased a hang-on but now I want a real one but then if I get a real one I am going to want a sump and all that good stuff so I think this will tide me over for a few months.