Koi Pond Aeration – Oxygen Level is Critical
Many Koi owners don’t realize how important the right level of dissolved oxygen in their pond is to the health of their fish. As a result Koi pond aeration is something that is often neglected. They think, because they have an outdoor pond, oxygen is something they don’t have to worry about.
The proper level of oxygen is important not only for the fish but also for vegetation in the pond and most important for the needed chemical processes that go on in a healthy pond including bacterial decomposition. Now every pond will develop its own particular oxygen demand. This demand is affected by the level of bacterial activity, the number of fish you have and by the decomposition of plant material in the pond as well as unwanted plant material that falls and collects in the pond.
The amount of dissolved oxygen that a pond can hold is dependent on several factors. Moving water can absorb much more oxygen then water that is standing or stagnant. The water temperature also affects the amount of dissolved oxygen along with salinity. With freshwater ponds, however, salinity is really not a factor.
As the temperature of the water rises, less oxygen can be absorbed. This is one reason Koi pond aeration becomes so critical in the warmer summer months. Keep a close eye on the dissolved oxygen levels in warm weather. Make sure you keep it at least between 5.0 and 5.5 mg per liter.
Keeping the water moving will provide good aeration and the oxygen level higher. With standing water, the oxygen levels can drop very quickly as the water becomes stagnant and dangerous for your fish. Waterfalls or fountains can help keep the water moving.
Don’t let the algae growth in your pond get out of hand. While algae creates oxygen in the daytime, it depletes it at night. Too much algae will make it much more difficult to control the oxygen level in your pond.
Remember to try and feed your fish during the cooler part of the day when it is hot. Fish that feed when it is warm utilize more oxygen than when it’s cooler. During the hot part of the day when the water is the warmest, the oxygen level will be lower. This combined with the feeding can bring the oxygen level down very quickly.
Make sure you plan for good aeration in planning a new pond or consider adding a fountain to an existing pond. This is one of the easiest ways to get good water circulation and add an attractive water feature at the same time.
April 10 2009 | Gardening | No Comments »