Especially not in large volumes of water in big areas like a pond. Although it is minimal, there is time and effort required to put into it.Weekly tests of the chemical make up of the pond water are vital. The filter extracts waste the Koi produce.A Koi filter is necessary and helps to maintain the biological balance in the pond environment. Much more so then many other types of fish, and therefore need more consideration when it comes to the pond equipment you will incorporate into their environment for their survival. Either take a pond water sample to your local pet store to have them test it for you, or purchase a home testing kit and test the water yourself.As with many other outdoor hobbies, there is a certain amount of maintenance that goes into owning a beautiful garden and maintaining a Koi fishpond. Only in large amounts are nitrates harmful to Koi. Fish housed in a garden pond or indoor tank environment require this natural process to be supplied for them.Still, A good Koi filter cannot work properly without a pond pump to force the water through the filter. This is a commitment that should be considered when taking on the responsibility of owning a Koi pond. The Koi filter traps these particles, which then need to be disposed of by the pond owner. After all, enjoying the peace and serenity of Koi swimming and playing in their garden pond is one of the most rewarding hobbies ever imaginable. The biological filtration relies on bacteria to break down toxic waste into less harmful substances. As a rule, this should be done during regular maintenance of the pond. However, pH can be harmful to Koi if it is left untreated at a high level.Additionally, Koi pond owners are encouraged to considered the possibilities of adding a small fountain, waterfall, or some other flowing water device to their ponds, along with a pond pump and the Koi filter, as fish require a constant supply of oxygen to the water. It is normal to have continuous low-level amounts of pH. This can be carried out in two ways. When raising Koi fish, a pond filter gives them the proper filtration of harmful substances in their environment. In most cases, filters available today have both a mechanical and biological role. The particles most concerning to Koi pond owners are ammonia or pH which are broken down into nitrates by the filter. The pump pushes the water and circulates it through the pond, thus assisting the pond filter in gathering waste particles and other debris for filtration. Because a fountain or a waterfall stirs up the water, this process of aeration allows the oxygen from the air to be folded into the water in a more natural way.. It is vital to maintain a chemical mixture in the water at a safe, fit level at all times. The strength of the filter is not able to circulate water on its own. The mechanical utility cleans particles from the water as gravity, along with the flow of the water; drag the solid waste out of the pond water. In nature, fish waste is moved along and dealt with do to the sheer volume of water in the area, and by the water's natural current. Koi fish are quite sensitive when it comes to the quality of the water in which they live.A Koi filter is an extremely important and vital piece of pond equipment, and it is an integral part of keeping your Koi healthy, happy and thriving now, and in the years to come