hello,
I think in 8 liters there is any kind of fish, even the oto, only Caridina. I am of the opinion that to keep fish in an aquarium must have a minimum of 30 liters.
8 gallons is about 30 liter (1 gallon = 3.78 liter).
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Mats
I'm sorry, and translating the page with google translator was ...