The diagram below shows a top view of different shapes that can be considered self cleaning.
Pond filtration system diagram.
Gravitational diy pond filter.
Bioball diy pond filter.
The biosteps 10 pond filter is the number 1 choice for koi ponds up to 1000 gallons and water garden ponds up to 2700 gallons.
Bio clean pond filter.
Up to 5000 gallons.
It is vital to keep these oxygenated by passing pond water through the filter 24 hours a day.
View 31 best koi pond filter system images.
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A biological filter works like a mini sewage system for the pond.
While there are commercial pond filter systems you can purchase many people choose to build their own to save money.
You can put together a surprisingly capable pond filtration system using commonly found household tools and a few components purchased from your local aquarium supply or pet store.
Notice the placement of the jets.
There is less regular maintenance or cleaning required since the aerobic bacteria eats the waste and cleanses the water through.
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In simple terms the media within the filter creates a huge surface area which becomes home to many millions of helpful bacteria.
This simple biological filtration process uses a gravity flow design that eliminates all moving parts from the filter and therefore removes common points of failure.