I have 140gallon well stocked mature mixed reef with a fuge underneath. I do nt have aggressive fish per sAy but they are active. Tangs, anthias, big pink spot goby, melanarus wrasse, clowns,and various others. Most of my fish are established and on the larger side. The only direct competition would me the wrasse but in general I don't keep small peaceful fish well. Ie firefish, as they don't feed aggressively enough. Do you think a mandarin is viable.
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