I set up a Spec V a few weeks ago. Lots of plants but only fish is a betta.
I was thinking of putting some small fish in it before I decided on the betta.
Chili Raspboras or Endler's Livebearers were the fish I was looking into, along with shrimp.
It's really to small for most fish.
My water is really hard and so that limits what I can choose.
Great for a betta - but my understanding is that they do better by themselves. I might try a nerite (sp?) snail with him.