Tank room electrical DIY: subpanel or no subpanel?

[midgetwaiter]

My Dad was an electrician and he loved to do everything in 220. as I understand it you can end up using less power with 220 than 110 in some situations.

I would also vote big time for the sub panel. This would allow you to use GFCI breakers in place rather than outlets. This way you could pretty easily minimize what else gets shut down when one circut ground faults.