"~ janj" wrote in message
...
Manky Badger wrote:
I'm starting digging a pond today. the plan is that it's 4 metres
long, 2 metres wide, and going down in steps to a maximum of 2 metres
deep. Anyone got any tips?

Some questions spring to mind - can I just dig the hole & line it -
will the sides cave in?

Depends on soil type and if you destroy the integrity of the soil.... When
we dug our ponds we didn't dig into the sides (change our mind on the
shape), so even though I'm in almost pure sand the sides haven't caved.
(12
years) 3 foot koi ponds have 18" shelf all around. 2 foot lily pond does
not.

But 4 meters is much deeper so you may need support or sharp angles
downward. ~ jan

I was planning on two metres deep as the main at the Koi centre said two
metres, but I read on the net that one metre is plenty. What IS the minimum
depth for koi carp?