Till its dinner for the anemone This mandarin already has 2 big strikes against it. I too had a 55g and wanted a Mandarin, but I added HOB fuge and spent months and $$$$$$s seeding the tank and getting the pod population up with many different kinds of pods before I added my mandarin. Then I still had to add pods for a few months. You can do it, but you need a fuge ASAP and a few hundred dollars in pods for the first few months at least. I call my mandarin my most expensive fish because I had ($200 in CPR fuge, and I don't want to even guess how much in pods). And you may read a decent number of posts about people successful with them in smaller tanks, but follow that thread for 6 months and chances are you stop hearing about the mandarin;( These fish generally take months to starve. Here's a perfect example of someone that did everything she could possibly do to keep a mandarin in a smaller tank, including getting an ORA on eating frozen food, and it still didnt work out. http://www.3reef.com/forums/tropical-fish/keeping-mandarins-nanos-2-a-134633.html Back to your other fish, can you post more pics of them so we can see what they look like a little better?