I have made a pud pond in the "klein lankloof" near Noll where my parents live.
They get water from pretty high in the mountains with a small pipe line. Between 2200 and 2500 litres per hour.
This water now goes into my pond and then from a bottom drain to a big gravel dam for irrigation.
No filter or pump, just continous water replacement.
The BIG question: with this flow available how big can i go ???
Current pond is about 5000 liter and will be made bigger with every chance i get. only have 3 small koi in for starters.
Frogs already love the protection from birds and there is a couple in and around the pond.