What are Some Types of Biological Pond Filters?
You can either buy a biological pond filter that includes all of the components necessary to clean the water or build one yourself. A biological pond filter must do two things: house the bacteria and make contact with the water in the pond. The type of filtration system you use depends first on the size of your pond. Water gardens that are smaller than 1,200 gallons can use a submersible, all-in-one system. Large water gardens need a larger filtration system often including several chambers to process all of the water and waste. For both sizes, water enters in the top, controlled by a pump, passes down through a filter to remove debris, then down through the bacteria and out the bottom into the main body of water. The key to a biological pond filter is the medium used to house the bacteria. It must be something that won’t affect the water chemistry. Materials that are best suited for this purpose are made of mineral compounds like clays, glass, and carbon granules like lava rock, or a
