I don't think this would work with the Remora. Any idea on the original question?
Edit: Will this work - three compartments; the first small compartment is the intake from the overflow with a divider almost to the top so that this compartment is almost full and overflows into the second large compartment (maybe to be used as fuge) which will house HOB
skimmer and heater and will have a divider just slightly lower than the first and overflows into the last compartment witch has the return pump to the main tank?
So, if suction is broken from overflow, return pump will only be able to pump what small amount overflows the second divider. If power is lost and the return pump stops, overflow will only take off the top of the tank until below the overflow intake - therefore there must be enough space in the final compartment to handle that amount of surge.
What do you think?