settlement chambers for koi ponds

Settlement chambers are useful, albeit somewhat ugly things. Thankfully they can be easily hidden however.

Settlement chambers - essential ...

What is a settlement chamber?

Click on the picture above for an enlargement...

We have seen that bottom drains are essential in a Koi pond. We have also seen that 110 mm piping is the way to go on bottom drains and that we don't want pumps in the water path before mechanical filtration takes place.
A settlement chamber is a smallish concrete chamber that has the 110 mm bottom drain pipes entering the bottom of the chamber vertically.

http://www.happykoi.co.za/how_to_build_a_koi_pond_part_4_settlement_chambers.htm