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Pond Volume Explained  
An Honest Approach to Filtration  
Alternative Filter Installations  
Basic Filter Types  
Basic Filter Types (pg 2)  
Basic Filter Types (pg 3)  
 

Basic Filter Types
  Gravity Fed Filter System with Vortex chamber and Cartridge Filter
  The installation shown below is a very popular configuration and gives extremely good results. The diagram clearly shows the correct order in which the filtration system should be assembled . Fish waste and other solid particles fall to the bottom of the pond where they are drawn into the bottom drain (1) and on via the large diameter pipe (2) to the Vortex (3). Gravity systems should be fed by large diameter pipes as they offer less resistance to the water flow (as no pressure is available other than gravity). 3" and 4" pipes are the most popular. The whirlpool action of the Vortex causes the heavier particles to fall to the bottom where they can be drained off. This decrease of heavy waste to the main filter (4) increases its performance and reduces the maintenance. The water is then sucked through the vacuum pipe (5) by the surface pump (6) and pumped through the Cartridge filter (7) and then the UV (Ultra Violet Algae Master) (8). The water exits the UV still under pressure from the pump and is pushed through the magnetic venturi (10) to the pond. This action causes air to be sucked in (via the magnetic venturi) and mixed with the water, thereby increasing oxygen levels in the pond and filtration system. To simplify the drawing and maintain clarity we have omitted several items from the diagram including: drain valves, drainage pipework and filter media. (9) is a Yamitsu switch box.
   
  Gravity filters are installed at the same level as the pond. The water is pumped back to the pond.
   
  Basic Filter Types
   
  Larger diameter pipe is used on Gravity inlet
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Kockney Koi
www.kockneykoi.co.uk / www.yamitsu.com
Kockney Koi
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