Yes, the clown needs to stay in QT for 3-4 weeks. Clowns aren't picky eaters at all, if he wont eat those that you have, then it wont eat anything at all
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. Give it a couple days, most clowns need some time to get used to their new tanks. They can also go pretty long without eating(1-2 weeks). I've treated my Cinnamon with Coppersafe, that shouldn't effect your clowns appetite if you dosed it correctly.
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