A good and working filtration system is what you need in order to have a healthy and lively Koi pond. A filtration system promotes the biological balance in your pond. A filter in good condition works well without the use of a pump in order to force water through it.

So what are the filters that you can use which are necessary for your pond? Well, there are two types of these filtration systems. These are the mechanical and the biological ones. The biological filtration system is the one that depends on the bacteria in the breakdown of the toxic wastes (known as ammonia or pH), converting them into nitrates. These nitrates are substances that are less harmful (they're only harmful when left untreated at high levels and large amounts).

The mechanical filtration system is the one that cleans the particles (solid wastes from your pets) from the pond's water, which are trapped in the filter and then cleaned up when the regular maintenance period of the pond comes.

Your pond is a big area wherein the strength of the filter isn't enough to promote the water circulation (and remember that your pets need to have an ongoing supply of oxygen in the water). For this, to increase the strength, you can put add-ons like waterfalls, fountains, etc. These features can promote aeration, a process that agitates the water and in turn giving more oxygen to your pond.

It is necessary for you to keep the chemical mixture of the water at a healthy, normal range for your pets, so it's important for you to test the chemical content of your pond every week, and this is done by bringing a water sample to your local pet store and have them test it, or if you prefer not to have any hassles in going to the pet store, you can choose to buy a home testing kit to test the water all by yourself.

As a responsible Koi pond owner, take the time and effort you need to sustain the health of your pond. A rewarding hobby as it is, giving your pond what it needs (such as the filter) will make it a long-lasting one!