There are a few of these systems out there, Prodibio, Zeovit, and Brightwell. All have the same principle. You just have to figure out which is better for your setup. Iv been reading on all 3 for weeks, and talking to a lot of people who use em. The zeovit has a very defined process, a support forum, and a lot of experienced reefers are trying this with good results. The Prodibio and Brightwell products dont have a very defined process, atleast not as documented as the zeovit. I have been reading that the Brightwell is much cheaper to run, but does not have a user forum dedicated to use that documents users results, it also has a bio film residue. I have not really read any negatives on the prodibio.