Best Fish For Micro Aquarium. A single Dario Dario. Green in color they can add variety to your habitat.
Anyway if you are somewhat experienced in the hobby Scarlet Badis are an excellent choice for a micro fish that thrives in unheated water. Betta fish are a typical choice for a small tank but even they need a fair amount of space. Fortunately this guide solves that problem.
The Hara Jerdoni is one of the tiniest and small species of catfish perfect for nano tanks.
Normans Lampeye Killifish is another species of killifish that can thrive in a small freshwater tank. These fish are a great choice for invoice aquarium hobbyists. They like to live in an aquarium that resembles a river with rocks and greenery but they will do well in other setups too. They do well in small groups and you can easily fit a school of 6 in a 5-gallon tank.