a generator is the answer and i do have one but with these gas prices who can afford to run them? not me that for sure the battery powered air pumps kept my fish alive for 2 weeks like i said before so no worries about them but my corals thats a whole nother story! i dont even wanna start to add up all the $ i have invested in corals alone! if it came down to it id definitly be running my generator but not all day... more like a few hours a day