Ember tetras....hate spell correction!
Does your decor pass the panty hose test? Run a pair of hose over the decor and if it snags so will the Betta's fins.one specific tip I have had trouble finding comes to mind looking at your beautiful fish: how do you maintain half moon bettas fins so well? I have no problem keeping HM alive, but my current one came home with beautiful fins, and has generally never had them look that good again. The obvious thoughts are water quality and good stock to begin with, but do you have any other fin-specific advice?