I started my bait tank last year, but had some troubles when we had power failures. I have a 100 gal. stock tank, two airstones, and a biofilter. The filter is the waterfall type. Each time we lost power for more than 30 seconds the water would siphon back into the tank, and when the power resumed there was not enough water in the reservoir to start the process of siphoning water back into the filter. Anyone have the same problem? Any suggestions? BTW, this usually happens while I'm gone to work!