Also lost the tomini tang during a 9+ hour power outtage. Making me consider some sort of back up...water went down to 60F.
Thats a major bummer... the problem is heaters can use a ton of power... and battery backups for them dont come cheap. Also should look into a bubbler with a battery backup, on the upside with these, you can get some pretty for cheap that have battery backups built in, and since your system isnt HUGE it would probably only need 2 or 3 (depending on the size of the bubbler).