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No, but if you are intent on using a med in the display tank, you may want to look at this http://www.aquariumadvice.com/viewtopic.php?t=55745, some have claimed success with it. I cannot say it's a good product, never used it. I would go with QT and hypo or copper. In a fish only, hypo can be used in the display tank if you have no inverts or algaes to lose. HTH