Help needed on filtration system on my 9000 litre pond!
I am in the process od building a 9000 litre pond and need some advice on pumps and filtration systems.
The ponds is actually two ponds joined by a thin, stream like channel (please see image below.
I would like to stock it with a small number of fish (maybe some beautiful Koi Carp - money permitting !)
Can anyone help me with advice on pump size, type of filtration system, UV purifiers ?
All help appreciated.
Here is a link that might be useful: