Pond Filters

Written by Michael O'Brien
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Pond filters are an essential component in keeping a pond clean and free from harmful substances. There are many choices when it comes to filters, however. Which is the best one for your situation? Do you use a mechanical filter or a biological filter? There are some experts who even believe that no artificial filter should be used at all in a pond.

Pond Filters: Determining Your Needs

Mechanical pond filters are best for situations where absolute purity is important. They process and cleanse large quantities of water and keep a pond pure enough to drink out of. Mechanical filters are good for decorative ponds with fountains or waterfalls. They are not as preferable for ponds that are going to have plants and fish in them, however.

Biological pond filters are the kind most recommended for use in ponds that are trying to be miniature ecosystems. First of all, they don't disrupt the water as much as mechanical filters. Secondly, they maintain a certain degree of bacterial content in water that plants and fish need to thrive. I used to have an aquarium that I often neglected to clean. Fortunately, the inhabitants of the aquarium were salamanders. The dirty, algae filled swamp I had created was the perfect environment for them and they lived for over ten years.

The point is, you want the water in a pond to be clean, but not too clean wherever life is concerned. This is where the school of thought that believes no artificial filters should be used in a pond at all comes in. Plants absorb animal waste and fish eat excess plant matter. This is a good idea in theory, but be careful. You have to really know what you are doing before attempting to create such a pond.


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