Koi Pond – Filter systems

Knowing which filter system you will be using is important. You will need to make sure that you have a system that can support the volume of your pond effectively. You will also need to decide this base on the space that you have available to support the pond.  There are a few types of systems available and they can be roughly broken down to these few:

  1. Prefabricated multi-chamber systems.
  2. Vortex units.
  3. Home made filters from concrete blocks waterproofed with G4

You will also have to make sure that you have enough space in your garden to support the size of the filter system itself.

A typical 2 bay filter system supports up to 1000-1500 gallon ponds, a 3 bay system supports 1500-2000 gallon ponds; while a 4 bay system supports 2000-2500 gallon ponds. Consult the supplier and let them know what you need the filter system for, as they would be able to advise you on the best one that is suitable for your pond.

Prefabricated multi-chamber systems

Prefabricated multi-chamber systems come ready built. All you have to do is just provide them with the space to install it.

The figure below gives you a general idea about the layout of a 3 bay filter system, which is typical for most of the different types of system available, except for the Nexus unit.

Water enters the system from the vortex or the settling tank then goes to the bottom of the first chamber. It then raises through the filters right up to the top, then overflows into the second chamber. This then repeats with the 2nd chamber into the 3rd. From the third bay it is then pumped back into the pond. Any solids that enter the system will then slide down towards the bottom drain and flushed away.