KittyKat
Aquarium Advice Activist
Trigonostigma hengeli is a bright little thing, 15 would be a good number to start with, potentially up to 20.
Danio choprae might be closer to what you want because they're more likely to school, again start with 15, potentially go up to 20.
Puntius titteya are a good option if you want something larger, I'd start with 5m 5f or similar, maybe go up to 15.
If you're not too worried about same area/biotope-like, then what about a group of 6 Tateurndina ocellicauda and 10 Pseudomugil mellis?
Danio choprae might be closer to what you want because they're more likely to school, again start with 15, potentially go up to 20.
Puntius titteya are a good option if you want something larger, I'd start with 5m 5f or similar, maybe go up to 15.
If you're not too worried about same area/biotope-like, then what about a group of 6 Tateurndina ocellicauda and 10 Pseudomugil mellis?