A few simple picture outlines for you...

Note the settlement chamber design - pioneered and perfected by our builder over the years. These things really WORK brilliantly.

How to build a Koi pond pictures and designs

We start off with a plan view (looking down on the Koi pond).

Typical Koi pond plan view

 

Looking at the pond through it's section...Note the aerated bottom drains. Do NOT run the air piping for these through the drain pipes (it's tempting but fatal).

Typical section of Koi pond

Moving onto the settlement chamber you can get a clear indication of good design from the following two pictures..

Settlement chamber section

 

which neatly leads to our filtration system design...

Typical Koi pond gravity fed filter system

You can see some other koi pond systems designed around similar principles here...