Have you ever wondered what a koi filter does and why you need one? I know I used to. I wondered why my koi couldn’t just live “naturally”. The problem is that when koi (carp) live “naturally”, they live in fresh, running water. They also do not live in as high population densities as they do in an ornamental koi pond. Since we have taken them from their natural habitat and placed them in a closed environment we need to ensure that they have clean, pure water to live in. In fact, I was told by an aquatic veterinarian that the most important factor affecting koi health is WATER QUALITY. The only way to ensure good water quality for your koi is through proper pond maintenance.
The primary piece of equipment for this maintenance is your koi filter. Without proper koi pond filtration you cannot have the quality of water you need to keep your koi alive, much less healthy!
So…how does koi pond filtration work? There are several aspects to koi filtation and different types of koi filters. It is widely agreed upon that a combination of mechanical and biological filtration works the best.
Skimmers and pond nets are two ways of dealing with larger pieces of debris like leaves, twigs, insects, etc. You can purchase a skimmer separately or even get a bigger filter that combines mechanical filtration with biological filtration. If you get a combo type unit you will have less plumbing and electronic equipment to deal with. Your skimmer will do just as it says and skim the larger chunks of debris, allowing only the finer sediment through the biological filter. This filter is populated with beneficial bacteria that feed on, and eliminate the ammonia from your pond, changing it into nitrites and nitrates. A biological koi filter take time to develop a large enough population of bacteria to operate at peak efficiency, so prior to this you will want to monitor your pond water more frequently and make adjustments as needed.
Your koi pond filter is the “heart” of your pond, keeping the water clean and healthy for your fish!