What version of MF2 are you using? 1.1.8 and earlier has the freezer, and everthing later has the vat. The newer version of Mariculture is a lot easier to use and comes with in game manuals, so I suggest updating to 2.1.3It would have came up for the recipe in NEI
They were just behind on versions. Thanks for the great mod joshie.Hmm, the recipe shows up in NEI if you look up the recipe for a container, holding molten magnesium. (You can also get at this by looking at the ingot recipe, and on the ingot caster clicking on the molten magnesium). It's also like on page 3 or 4 of the processing book.