Cecil, if the tanks will nest inside one another, I wonder what shipping would be on 2 or 3 of them?
Makes sense.
I've decided back up power is something I need to invest in before I add another tank. Gonna get a gas powered generator for the house and maybe an inverter/battery back up for the tanks in case I'm not home and power goes out.
On the other hand it may make more sense to get a couple of battery powered agitators for if I am home and power goes out and just have the RBC's run with the battery powered pumps I have.
Decisions, decisions!