I’m guessing that the tank is 12” wide that will leave you 9 gal (guessing at the size of your skimmer and pump displacement) of free water in case of power failure. As long as the water level in your tanks doesn’t drain by more than 3” in a failure due to siphoning you don’t have to worry about a wet floor.
Yes allready did a power fallure everything is fine at 6 1/2" in the sump it leaves me 2" to spair in the sump,just wanted to make sure baffle placement was right as they arent that easy to change LOL.
Phil