Great advice There's nothing like having a backup plan.
For those fellow computer geeks out there. If you have a spare UPS lying around, you can hook it up for your heater and pump. (Lights are too big of a power drain).
For those of you that aren't familiar with the term.
A UPS is an Uninterruptable Power Supply, used for computers. A UPS instantly switches to emergency battery backup power and allows your computer
(or in this case aquarium
)to work through brief power outages. High-performance surge suppression protects your equipment from electrical noise and damaging power surges - even lightning.
Depending on the on the size of the battery in the UPS and duration of the outtage, the UPS may only give you 30 minutes of power. However, that would be ample time to go get your foam cover
The beauty of the UPS is that it is automatic, so even while you are out and the power goes off, it will automatically switch over to battery power and when the power comes back on go back to regular mode and charge the battery so that it is ready for next time.
Just a thought.