yes, and i love it. i have it running on a 300 gal system with 5 large tangs and assorted other fish that are all well fed. i have little to no nitrates and that is how it has been since put it in my system. i started with 40 parts.
@Skene its a vendor link here on MR>>"Answer" click on the link for answer..@Reefer how long have you had the system running on your set-up? Thanx Jay..