Hey Kaludar, I think you and I might have the same system. I've been operating my Red Sea Reefer 250 for 4 years. Top to bottom I have a yellow tang, coral beauty, two clownfish, yellow clown goby, sunburst anthias, pintail wrasse and a diamond goby. For me personally, I have felt a bit of struggle keeping my yellow tang healthy at times and I do honestly feel like his overall health has been compromised being kept in a relatively small display. For that reason I would recommend not getting a yellow tang. As for the Dwarf angel, I would do your best to source one from a shop that has a good history of reef safe behavior with their flame angels and chances are you should be okay. Remember that most reef animals are opportunists and if they're well fed then they won't have any reason to go for less appetizing food. Good luck!Hi all, pretty simple question here, but I have a 54 gallon display tank with a 11 gallon sump. New tank, but I really want a Yellow Tang and a Flame Angel, are either of these fish realsitic for my tank? I've heard answers both ways on the Tang, and the Flame seems to be questionable as well, both in terms of my tank size and being reef compatible.