Warning

[justincgdick]

Like was said above, an arc fault would technically be best to prevent the fire like the OP had, but arc faults aren't perfect. You can "trick" them by accident when motors start up, etc. So while they do what we want, they also do what we don't want.

I myself would go with multiple breakers/ circuits for a big tank, surge protection (to protect a lot of valueble stuff), and multiple GFCIs.