Minnows, snails, shrimp. Most sell minnows dirt cheap. Gold fish must have a filter otherwise they will not live and the best choice for your tank would be a Betta fish with one or two plants glad to help!
How many neon tetras can I keep in a 50 Litre tank?
50l would be roughly 12 gallons and you could have a nice school of tetras. They are very social fish, so they need groups of their own kind. Flame tetras or Cardinals would be nice. If you went for the smallest tetra, the Ember, you could have 9 or 10 of them, and they are nice little tetras to keep.
What can I put in a 50-gallon tank?
Dwarf Cichlids, such as Angel Ram cichlids (Microgeophagus ramirezi) or Apistogramma Borelli opal (Umbrella cichlids) Rasbora such as Harlequin Rasboras. Dwarf Gourami species, like blue gourami or mosaic gourami. Guppies, Platies and Mollies.
How many fish can I keep in a 50l tank?
As a rough guide you can have 1cm of fish per litre of water equaling approximately 17 fish at 3cm adult length.