Mate that is the most impressive native tank I would ever expect to see. The fish behaviour confirms to me that you know what you are doing, I would say they are freely breeding right now judging from all the courtship and territory displaying going on in there. I used to collect all those species with my brother... Rainbow, gudgeons, honey blue eyes.... But the only non native I saw is the bristle nose Cattie, but that's ok every tank needs a good vaccume cleaner! Now all you need is a jack to terrorise what you have, and I could happily come over and fish.... In your tank! Well done, simply stunning!
Scalem