If you must dip lower than this percentage in order to get a filter you australian email database can better afford, you should not choose a filter that circulates less than 10% of the total water volume. Your pond filtration system should consist of two types of filtration. These are – Mechanical filtration Biological filtration How Filters Work Mechanical filtration works by trapping debris and fish waste as they flow through the water with the use of brushes, pads, sand, or small beads. Biological filtration involves a natural method that changes the fish waste into amalgams that will not hurt the fish.

the excretions, and a build up of ammonia can kill any fish. Bacteria that are present in a biological filter change the ammonia and nitrates in the pond water to nitrites, which are safe for koi. Your filtration system will also need a pump. You have two choices of what type of pump to place in your koi pond. The types of pumps available are – Submersible Recirculating The submersible pump is a good choice for a smaller pond. If your pond will feature a waterfall, a submersible pump can be used to handle the volume of the waterfall alone.