Mindy,
I would look at getting a RKL ($99 directly from DA) and it will let you control 4 outlets just like you've mentioned (at least I think it will). If not that...look for a used RK2 which comes with a 8 port power bar rather than the 4 that the new RKL's have.
Seems like a no brainer and given your habits to have multiple tanks...I'm sure this piece of equipment would never be wasted.
