Here is my AUL update. They outgrew 600 gallon tank in less than a year. 
Hopefully I don't have to upgrade their home too soon again.
Indoor pond in garage
Dimension: 12' x 6 'x 30" deep water level.
Filtration: Ultima 6000.
Water change: Every 3-4 weeks --> 30-40% water change
Diet: NLS mega pellets. Consume 4 lbs bucket every 6 weeks
Temp: ~70-74F.
[video=youtube_share;lzh8qyxz4mQ]http://youtu.be/lzh8qyxz4mQ[/video]

Hopefully I don't have to upgrade their home too soon again.
Indoor pond in garage
Dimension: 12' x 6 'x 30" deep water level.
Filtration: Ultima 6000.
Water change: Every 3-4 weeks --> 30-40% water change
Diet: NLS mega pellets. Consume 4 lbs bucket every 6 weeks
Temp: ~70-74F.
[video=youtube_share;lzh8qyxz4mQ]http://youtu.be/lzh8qyxz4mQ[/video]
