This is a discussion on Power out for 8 hours within the Freshwater and Tropical Fish forums, part of the Freshwater Fish and Aquariums category; -->
I've heard that occasionally a canister filter will go anaerobic during an extended power outage (measured in days not hours) which is a disaster ...
I've heard that occasionally a canister filter will go anaerobic during an extended power outage (measured in days not hours) which is a disaster when power resumes and toxic water gets shot into the aquarium. Anyone have any guidance/experience with this?
I have a couple of canisters that have been disconnected and off, but full of water, for almost 2 months now. I will be setting them up on the new 125 - i will let you know if the cycle is still intact. Probably be a couple more weeks. Ill start a thread when the time comes.
The micro organisms go dormant, they don't just die off readily.
Having said that, if you have shut off canisters and left them sit then the organic debris will continue to decay and produce ammonia and the buggers will still have a banquet. I expect that there would be an ammonia spike in the tank they are turned back on as it will take a long time for the canister's organics to decay completely, ammonia levels, even with it being oxidized, will be high.
8 hours is nothing unless there is some other imbalance already on edge in the aquarium system. A clean healthy tank will have no trouble with a short 8 hour power failure... excepting extreme temperature changes. Even then the temperature change is not any more drastic than might occur in a stream during a rainstorm... going back tot he natural environment for an example.
I'd suggest doing a water change today so the water is fresh if you are concerned, but don't clean or rinse out the filter or even vacuum the substrate... just a water change. If you are really concerned still, siphons work without power so you could even change water halfway through if you wanted, freshen the water with a pail of water that you fill today.
Well my dad got an airstone for the saltwater and let my freshwater alone. They both seem fine, fish unaffected. But I have yet to test it.
Also my question was would it affect the filter's cycle since i think it is still cycling