Smallest nano tank?

Hiya,

Since I moved Sus the betta downstairs into a bigger tank, my room looks kinda bare... I would really like a nano tank on my desk, but even Sus' old 2.5 gallon seemed huge (its a tiny desk )So my question is, what is the smallest tank I can get away with keeping anything alive in? I know fish are pretty much out the picture, but what about shrimp? I am doing this on a pretty tight budget as well, but my fish obsession seems to be taking over my life and its so strange to not have anything in my room anymore

Little bit of info:
I have around 1m x 0.5m of desk space, but I obviously still need space to work
I only have £30 max. spending money at the moment so if possible I would like everything to come to under that, or I could hold off until I have a bit more if necessary
I would be happy with any sort of fish/invertebrate but I don't really fancy a 'plant only' tank

Thank you

 

The smallest nano setup I've ever seen is one of these



But if you want something you can interact with, then look for a cylinder or hexagonal shaped container, to minimize the footprint, and then stock it with a few shrimp and colourful ramshorn snails. Fed sparingly, they won't overpopulate.

 

Do you want to use your existing tank? Sounds like maybe not? It would be great for some cherry shrimp and a few snails like mentioned. Cherry shrimp are pretty pricey but they breed a ton so it wouldn't be long before you had many of them. I find them very entertaining to watch.

Otherwise, a cube would take up less space like mentioned.

 

You could have a bunch of cherry shrimp and then if there's too many take out some an put them with ur betta

 

You could have a bunch of cherry shrimp and then if there's too many take out some an put them with ur betta

Yes, though odds are good they would most likely become a tasty snack to a betta