fish_freak said:The only way it could happen is if your tank water was two low and then it could happen with any filter. When I do a water change I always have to refill my AC's with water because once the end of the intake tube is exposed it creates a reverse syphon and emties out the filter. I have never once had a problem with them not restarting after a power outage and unfortuneatly I have lots of experience with this problem lately. As long as the filter box stays full of water they should prime no problem. All filters will have this same problem. You cant create section unless the end of the intake tube in the filter is covered with water.
This has been my experience as well. AC filters do not siphon water, they pump it through an electromagnetic pump system.