I've heard that one firemouth can live in a 29 gal, but if you are planning on a larger tank anyway, larger will of course be better.
As far as tank activity, I'd add a school of some sort of tetra. I tend to like them better than barbs. Danios are another option, and they are very active. My firemouth used to spend a lot of time hiding, but since I've added some floating cover he seems to venture out more. I use floating hornwort.
As far as tank activity, I'd add a school of some sort of tetra. I tend to like them better than barbs. Danios are another option, and they are very active. My firemouth used to spend a lot of time hiding, but since I've added some floating cover he seems to venture out more. I use floating hornwort.