At these times, there are two other filter media that can help to reduce pollution levels present in the water. Zeolite and activated carbon clean the water by chemical rather than biological means.

They are also useful in a new biological filter system while you wait for the colony of oxygenating bacteria to mature. Zeolite is a naturally occurring substance and is graded by size.

If placed on a tray in a filter chamber, it will remove ammonia from the pond water. Once saturated, it loses its effectiveness, so remove it from the system and recharge it by immersing it in a salt solution.

This action releases the ammonia and, after a thorough rinsing in clean water, it can be replaced in the filter chamber for further use. Zeolite is useful in temporary quarantine or medication ponds that do not have an established filter.

It can also be employed in the main pond filter when an increased load is present, such as when new fish are added. Remove zeolite from the filter before adding salt as a pond treatment, otherwise the ammonia the zeolite contains will be dumped back into the pond.

It may also remove other pond water treatments if left in place. Activated carbon will remove many pollutants from the water by adsorption. It is not normally used continuously, but only when needed, for example to remove pond treatment mechanicals.

When the many pores that is made by applying heat during manufacture are full, the carbon is exhausted and must be replaced. Several types of activated carbon are manufactures, but only use those made for aquatic purposes.

In addition to a well designed filter system incorporating suitable media, there are devices that further improve the water quality in the koi pond. While not being absolutely necessary, they will certainly make a noticeable difference to the clarity of the water and your view of the koi in the pond.

It is extremely vital thing to give Koi the proper filtration in a pond environment when raising them.  Koi fish need more consideration when it comes to some of the equipment such as filters since they are more sensitive to the quality of the water then other fish

A pond filter helps to control the biological balance in the pond system and removes the waste that the Koi produce.  In the wild, fish waste is removed by the water’s current and because of the volume of the water in the area.  When fish are in a contained environment they need to have this natural function supplied for them which becomes the job of the filter.  Most of the pond filters that are available have a mechanical and biological function.  The mechanical function cleans particles from the water and the gravity and the flow of the water drag the solid waste out of the Koi’s pond water.  These particles become trapped in the filter and are cleaned out by the pond owner during the regular maintenance of the pond.  The biological filtration relies on bacteria to break down toxic waste, also known as ammonia or pH, into less harmful substances like nitrates which are harmful to Koi in large amounts.  It is normal to have continuous amounts of pH on a low level but it can be harmful to Koi if it is left untreated at a high level.  

Without a pump to force the water through it, a excellent pond filter may still not work properly.  The strength of the filter may not be able to circulate the water on its own in a huge area like a pond so the pump pushes the water and circulates it through the pond. 

Pond owners may want to consider adding a small fountain, a waterfall or some other water device in addition to the pump and the filter.  Having a constant supply of oxygen in the water is very vital to the fish to.  Because a fountain or a waterfall stirs up the water, it allows for aeration, which is the process where the oxygen from the air is folded into the water. 

It is vital to keep the chemical mixture in the water at a normal and healthy range for Koi fish and this can be done by testing the water. Testing the chemical make up of the water of the pond should be done weekly and this can be done in two ways. You can bring a sample of the pond water to a local pet store to have it tested or you can buy a home-testing kit so you can test the water yourself. 

Although the time and effort it takes to maintain the pond is minimal, owning a gorgeous Koi garden does not mean that it is completely maintenance free.  You should consider the responsibility of owning a Koi garden as it is one of the most rewarding leisure activities that anyone can have.

Pond pre-filters are usually encapsulated in a plastic case with some sort of foam rubber / filtration material surrounding it that filters out any debris before it enters your impeller and clogs up your pump. Pumps typically come equipped with a pre-filter when you buy. Some pumps do require you buy it and install it separately. It is vital for you to be cognizant of whether the pump comes with a pre-filter included prior to purchasing. Another variant to the pre-filter is called a pump sock. It’s typically netting, usually lined with a foam material that slips over your pump. Pump socks are not ideal because the pump can suck the bottom of the sock into the impeller which causes havoc and more work than if you had no pre-filter period. Pond filtration bio-filters are installed outside the pond with a UV light attached seems to offer the best of all worlds. This filters can be used for either commercial or personal use such as a leisure activity (Koi Pond applications). The clean things about bio-filters are that they keep blanket weed and / or string algae and most other common algae out of the pond. There are several brand offerings all of which provide for excellent operation. Bead type filters come in a canister full of beads that resemble a packed full jar of milk duds. The small “beads” function as surface growth sites for bacteria and to help keep your pond clear. UV lighting destroys terrible bacteria and suspended algae. Cleaning is simple thru a back-wash effort via a turn of the handle with very small water loss in the process. One potential downside to a system like this is cost. In some large pond applications the system can easily exceed $5,000 USD. Pond filtration biofilters are truly versatile whereby they can be installed in or out of the pond. There is also the option of having UV combined with the operation which only enhances it overall functioning. Bio-filters build up a colony of excellent bacteria that eat algae and develop your pond into a balanced ecosystem. Mechanical filters simply filter out suspended particulate matter from your pond. The mechanical filter requires monthly cleaning to wash out the debris it has removed. Mechanical filters are typically less expensive than bio-filters. For larger ponds we recommend a bio-filter housed outside the pond. Gravity feed provides for the water to be pumped into the filter which then drains out into your pond. Typically you will want to cover your system in some fashion (fake rock). By adding a dedicated pump for this filter you then have the option of making a splendid waterfall for your pond which will generate some nice natural noise. Bio filters can be left alone and cleaned yearly unless you feed your fish or have Koi. It is always a excellent thought to introduce aeration and make movement for ponds and waterfalls. It is possible to make your own pond filtration apparatus. You should use at least a 5 gallon nursery pot which can typically be bought at your local Lowes or Home Depot store. The filter you build will be a container of lava rocks or bio balls which will act as the filtration medium. It is vital to know that the water must cover the filter while the pond pump will be kept at ground level. You must get the water into the top of the filter and pull it out of the bottom with a small pond pump. This can be accomplished with a simple tap that attaches to the intake of the pump. An alternative method is to place the lava rock (or bio balls) into a mesh sack; then place the pump at the bottom of your filter apparatus with the bag on top. It is vital to make sure the entire system is full of water so the pump is primed and ready so when it is plugged in the system is fully functional. If you have no live fish, plants or debris which can get caught in the pump then it is possible to have no pond filtration. Without a filter we do recommend aeration and movement for all ponds and waterfalls to keep the water vibrant.

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The OASE Filtral 5000 is a complete underwater pump, filter and UVC. Its compact design, and integrated features, significantly reduce the impact other forms of filters can have on the water garden. . .