there really is no need for Nitrox there.
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OK - here is the deal -
First weekend in February, Saturday the 2nd - there is a 3 dive minimum. We can dive at 9, 1 and 4 on Saturday. Total damage is $195 each (air included), or $225 if you use Nitrox.
I need to have a headcount to them very soon, so all who are interested please let me know.
I might not care to spelunk that down for one day of Midwest diving.