This is my 29 bio. Stock lighting, no skimmer, no heater. I do run a Santa Monica HOG. I vacuum the sand once every two weeks. And dose as needed. Some Lps with 70+ diff types of z/p. Half dozen chalices. And four fish. Tank has been up for 1.5 years. I ATO with kalk and feed my fish Larry's two sometimes three times a week. All my fish are work fish except for my ugly cardinal. He come with the tank and I can't catch him now to get rid of him. For the tang police, please understand my best friend owns a lfs and when I feel my yellow gets to big or is getting stressed out. I will trade him back in for a baby. I also have a six line to help clean my Zoanthid addiction as well as a star blenny. In the past 9 or so years i have had 120, 90 bow, 40 breeder and this is by fare the best and easiest tank I have ever owned.