Chemical Pond Filtration: Removes pesticides, colors, odors, organic waste, excess nutrients and other harmful chemicals from your pond. Ultraviolet Clarifiers, carbon and zeolite are examples of products to be used in your filter for chemical filtration.
Biological Pond Filtration: This is where your pond filter provides a place for beneficial bacteria to grow on special media. These bacteria remove harmful dissolved pollutants and nutrients from pond water. Known as the "Biological Filter" these beneficial bacteria convert poisonous compounds such as ammonia and nitrite, into less toxic nitrate. The end by-product, nitrate, is used as a food source by aquatic plants. This continuous process is called the nitrogen cycle. Our BioSteps and Koi Clear Filter have very large available surface area for bacteria growth.
Biological Pond Filtration relies on specific bacteria to break down toxic waste products to less harmful substances. There are two stages in the breakdown of ammonia, each stage involving different types of bacteria. The first stage is the breakdown of ammonia to nitrite by nitrifying bacteria. The second stage is the conversion of nitrite to nitrate by different species of nitrifying bacteria.
The biological filter will take weeks or months to mature, cultures of nitrifying bacteria are widely available and will speed up the process.