Make sure its acclimated slowly putting that big of a fish in a 29 can be a problem.its hard for fish that big to adjust to the smaller tank. Good luck with whatever you do grow out and post updates.
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I'm not trying to be a Debbie downer or anything but are you sure he 11" ? He look a little smaller like around 8-9" . This was mine and she was 10.5" when she passed two weeks ago.
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