I have 15 wc acclimated Mangroves and its been my experience the larger animals do better than juvies so get the biggest ones they have. You will need to treat them for parasites..I typically wait 60 days or so and only after a few good feedings. Treat twice about 10 days apart then again in about 60 days. I then treat annually as a preventative measure.

Of note, if you plan on breeding the females can be cannibalistic..learned that the hard way! Make sure they are of equal size at a minimum...preferably the male being larger.

Bill