60gal is considered a min, because the manderins need a TON of copepods to eat. If you have a healthy refugium and plenty of pods going, it might work for you. Keep in mind, these fish will eat hundreds, if not thousands of pods each day.
When I first placed my manderin in my tank, the pods were so thick my water looked cloudy. The fish decimated the pod population in less than 3 days. I have a smaller tank and run 5 phyto cultures to feed my 3 pod cultures to feed my 1 manderin. A lot of work for 1 fish, but I love my manderin!
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