Koi/goldfish Pond All Natural

capecodder

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I'm just curious if other people out there keep their ponds natural. I've had a pond for 19 years and I've never had a filter, never tested the water and have healthy fish that breed and never seem to die. I do run a waterfall in warm weather and an aerator in cold weather. Anyone else?
 

maggie thecat

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Is your pond heavily planted?

I have run seasonal still ponds without mechanical filtration. But nothing larger than the size of a bathtub.
 

scarface

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Growing up, my dad built a gamefish pond. No filter. It did very well.

A better option would be to build a mud pond, which is clay based. Healthier for the fish and even less need for a filter. But people choose aesthetics over pragmatism.
 
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capecodder

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That was cool that your Dad had that. My pond has a rubber liner....but there is mud on the bottom and all kinds of plants.
 

Ulu

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I think this has a whole lot to do with your local water quality. Here the water is too alkaline, but I believe where the water is softer you have a lot more acids to help break down organic compounds that would normally pollute the water.
 
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