Filtration requirements for water gardens are much less rigorous than for fish ponds. Water gardens without fish can be maintained simply by moving the water to avoid stagnation and unpleasant odors. Water movement can be provided by a water pump capable of circulating the contents of the pond on a daily basis, or with an air pump with attached air stones. Air rising to the pond surface then circulates and oxygenates the water. Don't forget if you have no fish in your pond, you will get mosquito's
Ponds with fish, regardless of water garden or fish ponds, have more rigorous requirements for filtration systems if the fish are to receive prepared diets. The minimum requirement for a filter is to remove toxic metabolites from the water. In ornamental ponds with fish, we also want clear water, which increases the complexity and cost of filtration systems. Planning and designing a filtration system requires that you have a final fish number and weight in mind before you build your pond. The demand on the filter arises from the amount of feed placed in the pond, NOT the pond volume. If you are undecided about the final sizes and numbers of fish for the pond, you can begin by adding plumbing sufficient to circulate the pond volume within one hour. You can then add filter components after construction without modification of the pond. Be aware that filtration systems using static media, such as matting, can occupy an area nearly half the size of the pond if adult koi are in the pond.
Below is diagram of a biological filter. We will be uploading more information and photos on building a homemade biological pond filter in the near future.
Building a homemade Biological Filter
We will be uploading photos and information on building a biological filter while under construction .
* Currently held up due to breeding season commitments.