My town is shutting off the power for 5 hours tomorrow. What would you recommend me to do with the filters on our tanks? (Whisper HOBs, Penguin HOBs, 1 Magnum canister.) I am worried about a die-off of beneficial bacteria; any and all info would be appreciated! I will unplug them to prevent a power surge when the power does go back on.. but should I do anything special w/ the cartridges to rpevent bacteria die-off? I have had these tanks for years, and they're all cycled to perfection. :huh: