I actually have 2 tanks that I can use as QT's. One is a refugium that I can connect or disconnect to my main sump. The other is stand alone, but I still have it plumbed so I can send DT water to it with a water change, to get the new fish acclimatized to the DT.
It really helps to have the DT upstairs, and my sump and other tanks all downstairs.
I use hypo salinity when quarantining new fish. Have never used copper or other chemicals.
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