Fantastic fish! I've got a male/female pair. The male cherry barbs in the tank were attacked by the male though, so I had to remove the barbs. I guess they look too much like him. They are beautiful fish.
"these are very friendly fish who need at least a 20g tank." Really? 20 gallons? I have talked to quite a few killie breeders who keep A. australe in much smaller tanks than that. If you're planning to keep this species in a community setting a 20g would make sense because of their somewhat passive personality (varies depending on individual), but as a species tank I do not see such a large space as a requirement. Bigger is better though and a nice breeding group would look stunning in a heavily planted 20g or 29g. Eventually the tank would be full of killies! My pair has proven to be pretty good eaters, but they still have a preference for smaller foods. This species will also predate many shrimp and is an accomplished jumper. Tight fitting lid is an absolute must!