HELP! Old tang not friendly with new tang

[naesco]

Originally Posted by bryceschutte

Thanks for your terrible useless advice. It was no mistake. I have added tangs previously with no problems.

What part of the advice did you find useless.
A sick, dying or injured fish is stressed enough without adding the stress of a noisy confined sump. This is even for true for a tang which can easily develope a serious ich infection and wipe out the rest of the inhabitants in your tank.
It would be better for you to give the tang to another reefer who has a QT set up to care for the injured tang.