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What You Need to Know About Pond Filtration Systems

Updated on June 14, 2015
pond filter
pond filter | Source

A pristine pond is every pond owner’s dream. Maintaining a clean and clear pond takes vigilance and hard work. You need to make sure that you have all the necessary components. One of the most important factors in achieving an optimal pond is the pond filtration system.

Reliable pond filtration systems result in a healthy, algae-free pond environment. To make a filtration system work, the pump should function at its best. The pump makes it possible for the water to move or circulate through the filter. Many pond filtration options are available in the market. Waterfalls, decorative fountains, or skimmer systems can truly make a difference in your pond’s water quality. To decide on the ideal pond filtration for your backyard pond, you should be familiar with the basic configurations in pond filtration.

Skimmer/external | Source

Waterfall or Skimmer External Filtration

This type of filtration is quite similar to pool overflow filters. This actually skims particulates from the surface of the pond as it overflows or pours over a skimmer basket. Water from the filter is pumped to the other side of the pond. Here, the water cascades back through a biofilter. Proper landscaping makes it possible to hide this filtration system, adding more aesthetic value to your pond. This is a type of filtration suitable for medium to large ponds, especially those with fish. It is low maintenance. You can easily remove the debris it catches.

Submersible | Source

Submersible Filtration

The submersible filtration system sits quietly at the pond’s bottom. This created a consistent suctioning action, which draws the water through the filter. It then pushes the filtered water to the waterfall of fountain. Here, the water recirculates back into your backyard pond. This type of filtration system is great for small to medium ponds. Ponds without fish or those with only a few fish are accommodated best by this system. Its maintenance depends on its location in your pond. With it, you don’t have to worry about aesthetics anymore because it is completely hidden in the water.

External | Source

External Filtration

This is the best type of filtration system if you intend to maintain your Koi pond. Any size of Koi pond can benefit from external pond filtration systems. Its design involves a pump with a skimmer or pre-filter, which takes in water from your pond and delivers it to a flowthrough filtration on land. The flowthrough filtration should be at a higher position. The filtered water then comes out of the system’s filter plumbing into the pond. This directional flow can easily be directed over a streambed or a waterfall. You can use this type of filtration on a pond that has or has no fish population. Simple landscaping is required to hide this system. Regular plumbing is the only thing you have to do to maintain it. It is very accessible because the filter is placed on land. Cleaning time depends on the design of your chosen filter. Some of the designs have easy switches, which you only have to flip to activate or deactivate. The external filtration also has a large selection of design and equipment, allowing it to have a flexible configuration.

Why You Need a Pond Filter

Pond owners are different. Some prefer to let their pond exist without any pond filtration system at all. These people swear that they are lucky to have pristine, natural, untouched ponds, even if they made the pond themselves. Any man-made structure is not a natural one. Therefore, a man-made pond can only maintain its good condition with a proper aeration or filtration system.

Filtration keeps pond water fresh. It cleanses away the organic waste materials, which bring forth murky, smelly, cloudy, and harmful water. This system also helps simplify the pond’s maintenance. It also recycles the filtered water, helping keep a gin-clear environment for the pond’s residents. Little or non-existent filtration is only applicable to ponds, which only have plants in them. This depends on the plant population you plan to keep.

A water feature such as a waterfall, a spitter, or a fountain, creates movement to prevent water stagnation. It also helps maintain the clarity of water, especially when dead plants accumulate in the pond water. If you decide to add fish into your pond, a filtration system becomes a priority. As you know, fish give off ammonia as part of their excretion. It’s toxic to fish, so it has to be eliminated from the water. Changing the water can help remove the ammonia, but a filter is the easiest way to rid the pond water of ammonia.

A biofilter is better than a manual filter alone because it also takes care of the unwanted chemicals and sediments. Manual filters just sort out the solid waste materials. With a biofilter, good bacteria clean the pond water for you:

  • Nitrosomonas bacteria—transform ammonia into nitrites, which are known to be harmful to fish.
  • Nictobacter bacteria—transforms nitrites into nitrates (food for your pond fish).

Koi pond filtration
Koi pond filtration | Source

Koi Pond Filtration System

A pond filled with beautiful Koi fish is every pond owner’s dream. Koi fish are considered prized fish and are only bred to decorate ponds. If you want to maintain a pond for your chosen Koi, you should make sure that an efficient filtration system is ready before you introduce the fish.

Koi pond filtration depends on your needs and your budget. Choose the right type of filtration system and you can save more money eventually. When you get the filtration system that fits your pond perfectly, you prevent the growth of unwanted algae. Remember that too much algae in your Koi pond sucks out the dissolved oxygen out of the water. This results into eutrophication, which kills off the fish and other living organisms in your pond.

Clean and clear pond
Clean and clear pond | Source

Benefits of Pond Filters

Pond filters bring health to your pond, whether you have fish or not. If you do have fish, pond filters allow you to grow healthy, vibrant fish. Efficient filters also break down particles of organic matter.

Bead filters are good filtration systems because they are highly efficient and they maintain a surface area with a high flow. They are also energy saving because it very well performs the work of a larger pump. New models allow easier backwashing.

Ideal filters have a high flow valve, which has the least water flow restriction. These filters encourage maximum flow, which allow better water circulation.

There are two types of filters, above ground and submersible. Good above ground filters should be bead filters.

Ultraviolet sterilizers can also be used with your pond filters. These help remove and prevent algae in your pond. The right UV sterilizer helps your filtration system work better, therefore saving you more money on repairs and replacements.

Keeping your backyard pond clean and clear can be a challenging task. If you have the right pond filtration system, the work is made much easier for you. Ask your pond expert to help you choose your pond filter. It may cost you a bit more to find a good one, but it is worth every penny once you experience the results.

Ponds Gone Wrong


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