Hermetically sealed aquarium

[Ray72]

I would be interested in building an indoor freshwater aquarium to do
some testing (Echinodorus cordifolius mainly).

But here's the catch: the entire system would have to be hermetically
sealed. I have built quite a few normal aquariums and such, but never
any hermetically sealed systems.

Could someone point me to the right direction from where I could find
more information of the subject? Any building tips would also be highly
appreciated :)




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Ray72