I ran one on my 180-gallon reef up in Dallas. I also had OxyGens on hand (I do not know if they are still around) to add to the tank if needed. The area where I lived was in a small town and electricity could be spotty during a large storm. It worked quite well. I did not run the system pump, skimmer, chiller or lights though, just 4 powerheads to keep flow going.

Charley