If you could have 220V for your tank, would you?

[Delphinus]

I want to do whatever the electrical inspector is going to be more likely to sign off on. Given the layout of the room I don't think there's a good spot for the panel to go that isn't in some form of risk for water contact, so I sort of see that as being the more troublesome option. So if I went 220/240 (and I have to say, I'm really, really tempted NOT to, at this point, for reasons of both cost and effort) I think I would just go with some kind of dryer plug or oven plug (I think they're different, but I don't think it matters because you can get the ends at HD/Rona/etc. so as long as the ballasts had the right plug put on for the outlet).