Very very nice. I'm envious.
As of right now, your stock constitutes a biotope. All three species are native to Borneo, Sumatra, and the Malay Peninsula. I think it would be fun if you kept with the Indonesian/Malaysian theme. It's not a common theme, at least among keepers on this site. Some possibilities (check with others for compatibility, I haven't kept any of these species):
Black Lancer Catfish
Giant Gourami
Pearl Gourami
Tiger Barb
Siamese Datnoides
Four-barred Datnoides
Numerous bettas, gouramis, rasboras, barbs, and sisorid catfishes are also from this region.
As of right now, your stock constitutes a biotope. All three species are native to Borneo, Sumatra, and the Malay Peninsula. I think it would be fun if you kept with the Indonesian/Malaysian theme. It's not a common theme, at least among keepers on this site. Some possibilities (check with others for compatibility, I haven't kept any of these species):
Black Lancer Catfish
Giant Gourami
Pearl Gourami
Tiger Barb
Siamese Datnoides
Four-barred Datnoides
Numerous bettas, gouramis, rasboras, barbs, and sisorid catfishes are also from this region.

