By The Water Consultant
27 Jun 2017
4:49 PM

Koi Pond Basics 101 – What You Need To Know

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When it comes to healthy koi and 5-star koi ponds, there are some basics that you should take note of. We break them down for you here.

Koi Pond pH (Potential of Hydrogen)koi pH

Measuring the pH of your koi pond water is important to ensure optimum living conditions for your koi.

Most species, including you and I, and koi, prefer a pH of 6.8 to 7.8, to a maximum of 8.2. Therefore, it is best to keep the pH of your pond water between the optimum range with regular testing.

DO (Dissolved Oxygen)

DO is essential in the water to allow the fish to breathe. With good DO levels, your koi will eat and grow better, as well as have a better colour.


Movement of the water is key to healthier koi as the surface is where the oxygen exchange takes place, resulting in the movement of oxygen-rich surface water to deeper water.

Koi Pond Filtration

Filtration is vital for two actions:

  1. It removes waste matter from the pond which would otherwise lead to a buildup of ammonia and nitrites. Subsequently, this would be fatal to the fish.
  2. The bio action which is from the good bacteria cleans the water to give it sparkle and clarity.

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In our next post, find out what you need to do in order to have healthy koi swimming in your koi pond.

Want to know if your home is suitable for a koi pond? Read our previous post to find out!