IF you are still in the mood to play with romex, why not wire a circuit or two JUST for the tank? You could have 2-15 or 20 amp circuits just for all the tank stuff. So when you get a bigger tank and add another MH or two, you will have the power there to do everything you want!
The two tanks are on their own curuits now. I'm one of those that when I get an idea in my head I roll with it. I was just mislead on this idea in the beginning.
