Black Knife fish can grow to 2ft in length! they are amazing but you need a 5ft tank minimum for these guys.
Gouramis are a no no with Bettas as they will fight to the death and almost all Cichlids will shred the Bettas fins with maybe the exception of Rams or Apistos.
Yeah, I noticed that they get big. Guess I'll wait for my bigger set up for that. I have gouramis in my tank already and them and the betta pay absolutely no attention to each other. I never realized how difficult it is to get fish! Anyone else have any suggestons for a peaceful larger fish?
Well if you want a Cichlid your best bet is either Apisto or Rams. Bolivian Rams get a little bigger, and can be a little more hardy, but GBRs are much more nicely colored, GBRs do need their water changes though so you must be diligent.