Oxygen content in Pond Water
Published: Fri, 23 Jun 2017 14:19:05
By: Steve Knowles
"All Fish require oxygen." Low dissolved oxygen level is an underestimated cause of many Koi Deaths. Koi Hobbyists need to regularly check the dissolved Oxygen content of their pond water.
Many factors affect the dissolved oxygen concentration in pond water. It's not just the fish load in your pond. The Atmosphere as well as weather can affect dissolved oxygen. Fish waste and decaying organic matter drain the dissolved oxygen levels because it is used up during decomposition. Aerobic bacteria (good bacteria) consume a lot of oxygen. Algae blooms and submerged plants also have an adverse effect on oxygen level because they consume a lot of oxygen through photosynthesis. This is why you may discover that the dissolved oxygen concentration of your pond is quite low in the early morning hours.
Warm water doesn’t have as much oxygen as cool water and fish require more oxygen in higher temperatures as they are extremely active and eating more often. In cooler water fish are less active and their oxygen demand drops off.
The minimum dissolved oxygen concentration for healthy growth, tissue repair and reproduction in koi is 6 mg per liter of water. An oxygen level over 7 is desirable, and any reading above that should be considered excellent. A dissolved oxygen level in the range of 7-9 mg/L is ideal for koi and goldfish to live and thrive.
When your koi are exposed to consistently low levels of oxygen you will find more illness, parasites and slower growth of your koi.
Air Pumps are designed to introduce O2 into your pond water. Waterfalls will assist in bringing some oxygen into your eco-system, but should not be the only source of O2 if your pond depth is belowDescription: When your koi are exposed to consistently low levels of oxygen you will find more illness, parasites and slower growth of your koi.
Key Words: O2, Dissolved Oxygen, Air Pumps