If you wanted to do something like this you are looking at something that needs to be set up like an eco system. If you watch that guys video one major thing to notice is he has guppies and snails both of these breed like rabbits so he has somewhat of a food source for the inhabitants. The majority of the creatures your going to want in your set up are breeders and cleaners. A good setup might be something like.
10 guppies: 3 males, 7 females
2 Mystery snails
1 clown loach: you would have to work something out with an lfs
where you could get a loach and once he got up to a few inches give him to the lfs
in exchange for a new small one which is actually a interesting concept to try out.
Crap loads of low maintenance plants.
Have a lid that doesn't allow for much air exchange to reduce evaporation
simple wet/dry system that is also pretty air tight. Maybe even a canister filter should be something that can auto start back up just incase of power outage. So no differential syphon it would have to work off an equalized syphon.
The setup should be by a window so algae can grown well. And so if lighting fails plants still have a source to grow by.
You could really go on for days to make it as fail proof as possible. The problem is though when you get back your gonna have a jungle on your hands most likely.
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