What other fish are already in the tank, at 4 tanks in a 220 gal tank in my opinion your have to many already and this could be why one is getting bullied.. I think a 220 should have 2 tangs at most, but you will find some opinions that varry from 1 tang to maby 3 . but I think most will agree 1 or 2 is all there should be in a 220.
but let us know what else is in the tank and then people will be able to help you more.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
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