It's Apogee MQ200 (I might be wrong on the model number, but that's my recollection).
BTW, Bulk Reef Supply has started renting them out for $40-50 / 14 days (wonder where they got that idea, almost as if someone was going to buy one and mentioned it to them while the club's was missing for like 3 years. . . . .
). So, definitely a big "perk" of being a member.