Hi Kaya,
just a thought I had, watching your video... don't your fishes look extremely clear ? Especially Davy Jones ! I guess it's because of the "light blue pool" color of your pond... I understand it's much easier to keep it clear and clean that way... But what would you think of putting a bit of golden sand into your pond, to obtain a more "naturaly Amazonian" look ??? and maybe a few branches or big roots to color the water into something more "dark gold"...
Again, it's just an opinion, my way of thinking, and definitely not a must or a wish... Can you tell me the advantages to keep them in this way in very "swimming pool like" waters ? Thank you in advance for your answer...