Tricaine is also know as MS222, a common tranquilizer used for shipping and handling. For shipping a dose of 10mg/L of water and for anesthetizing fish for handling 50-100mg/L. One more sedative that's used is Quinaldine sulfate but it's very hard on fish so it's not recommended, (only reason I mention it is if you run into it avoid it, it's not the same as Tricaine).
Doug
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