I'd agree and say it's just too small for any tangs. I learnt the hard way and bought a small yellow tang , he eventually out grew my tank (36x20x20) and developed MHLLE .
I do have a dwarf angel (Coral Beauty) that has been doing just fine for 4 years now. If you decide on a dwarf angel, make sure you pick the ONE you like, as you proably won't be able to keep more than one angel in a realitively small tank
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-captainhemo
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