Blue grundeon dartfish with other dartfish

[MaxM]

I have a solitary bg dartfish. I'd like to buy a couple more but can't find any currently.

Would my bg dartfish hang out with zebra or sissortail dartfish if I added those?

 

[PotatoPig]

Following as have zebra dart-fish pair I’m considering adding a blue grundeon to….

 

[Mr_Knightley]

In my experience, most, if not all dartfish species will co-exist peacefully and even school together. I have personally kept scissortails and zebras together no issue, but a friend of mine has a school of them with two of every commonly available species.
FIREfish are a different story, they are far more solitary and territorial. Usually you want to limit them to 2 per tank.