Thursday, August 20, 2009

Fountain Filtration

I have a waterfall type fountain and have put two Koi in it. How do I go about putting a filtration type system in it to ensure that they stay healthy? Recommendations? -Shane

Koi produce two types of waste:
  • Feces
  • Ammonia excreted by the gills
You will need two types of filtration to combat this:
  • Mechanical Filtration
  • Biological Filtration
Mechanical filtration will catch the solid waste so you can dispose of it quickly and efficiently.

We rely on bacteria to convert the Ammonia into less harmful chemicals, hence the term, biologica filtration. The bacteria need a place to grow, so a biological filter will have a lot of filter media for it to colonize on.

There are filters that do both biological and mechanical filtration. These are known as pressurized bead filters. You can find out more information on them here.

You may also want to get a UV light. It will keep the water in your fountain from turning green. More on those here.

You can pipe the equipment inline with your fountain, so the water gets filtered before it goes through.

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