Keyhole, cupido, guinanacara gaeyi, rainbow cichlid. Would be decent choices.
Personally, if you are definitely going 3x2x2, I'd replace the severum with something like the gaeyi. Just thinking a 10" sev would look a little out of scale in a 3' tank.
If you can, I'd go for the 4' tank.
Personally, if you are definitely going 3x2x2, I'd replace the severum with something like the gaeyi. Just thinking a 10" sev would look a little out of scale in a 3' tank.
If you can, I'd go for the 4' tank.