Summary: Pet tropical fish are hardy and can adjust to any kind of environment, Pet tropical fish show signs of stress and disease if there is lack of oxygen which results is an excess of fish wastage.
You will have to make certain the fish are community fish, meaning they like to be around other fish.
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One of my favourite fish, ever! Achilles Tang/Achilles surgeonfish (Acanthurus achilles) found on reefs of Oceania Hawaii/Pitcairn slightly less in Mariana Islands and sometimes reefs in southern Mexico and Guatemala