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

[brizzo]

The big question is how many amps you want to run;

All 240v receptacles require a 4-wire nmd cable. red (hot), black (hot), white (neutral), bare copper/green (ground).

20 amps (baseboard heaters) = 12/3
30 amps (dryer) = 10/3
40 amps (stove) = 8/3

You also have to ask the question of spending the money for a gfi circuit breaker (65 to 220 dollars depending on amperage and brand of panel).

The question you have to ask is how many watts will all the current equipment draw? Do you have 1 single 15 amp circuit for all your equipment, and your lights?

How many ballasts are you going to run in total ??