im looking into adding more aeration to my pond. i have a lot from my waterfall but not nearly as much as i would like to see with my fish load. right now i have 13 koi, and 4500-5000 gallons in my pond. ive been looking into some aeration pumps and seems either that cost a ton of money or are very cheap.
ive looked into medo pumps, which i know are outstanding pumps. what other pump companies make good pumps. looking for 1-2 cfm pump. and i will be adding air stones in the pond. 3-4 small ones in a few places.
also foudn this information so im confused on what sizing i actually need.
So how much air do you need?
Pond Volume in Gallons
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
40 80 120 160 200 240 280 320 360 400
Liters of air/min required to maintain
Dissolved Oxygen at Koi Safe Levels
These numbers are intended as a guideline. Your application may vary according to stocking levels. (In general terms, 40lpm per 1000 gallons is a good rule of thumb.)
Oxygen in ponds comes from two sources--photosynthesis and diffusion from the air. The most important source, photosynthesis, is the process plants use for manufacturing food. In the presence of sunlight, plants (especially algae) add oxygen to water as a by-product of photosynthesis. At night, no oxygen is produced, but respiration of algae, fish and bacteria continues to remove oxygen from the water. Most of the time there is a desirable balance between how much oxygen is produced and how much is used, but under some conditions, the balance can be upset, and the oxygen concentration becomes low enough to stress or kill fish. The amount of oxygen in pond water can vary considerably from pond to pond and from hour to hour. Typically, oxygen concentrations are lowest at dawn and highest during late afternoon.
The amount of oxygen water can hold is dependent upon atmospheric pressure, salinity and temperature. Water will hold less oxygen in higher altitudes. Salinity is also a factor in oxygen levels and can easily be tested with a salinity meter or test kit. The most important factor is water temperature. As temperature increases, water can hold less oxygen. Most low oxygen problems occur from June through September. The reasons for this are:
ive looked into medo pumps, which i know are outstanding pumps. what other pump companies make good pumps. looking for 1-2 cfm pump. and i will be adding air stones in the pond. 3-4 small ones in a few places.
also foudn this information so im confused on what sizing i actually need.
So how much air do you need?
Pond Volume in Gallons
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
40 80 120 160 200 240 280 320 360 400
Liters of air/min required to maintain
Dissolved Oxygen at Koi Safe Levels
These numbers are intended as a guideline. Your application may vary according to stocking levels. (In general terms, 40lpm per 1000 gallons is a good rule of thumb.)
Oxygen in ponds comes from two sources--photosynthesis and diffusion from the air. The most important source, photosynthesis, is the process plants use for manufacturing food. In the presence of sunlight, plants (especially algae) add oxygen to water as a by-product of photosynthesis. At night, no oxygen is produced, but respiration of algae, fish and bacteria continues to remove oxygen from the water. Most of the time there is a desirable balance between how much oxygen is produced and how much is used, but under some conditions, the balance can be upset, and the oxygen concentration becomes low enough to stress or kill fish. The amount of oxygen in pond water can vary considerably from pond to pond and from hour to hour. Typically, oxygen concentrations are lowest at dawn and highest during late afternoon.
The amount of oxygen water can hold is dependent upon atmospheric pressure, salinity and temperature. Water will hold less oxygen in higher altitudes. Salinity is also a factor in oxygen levels and can easily be tested with a salinity meter or test kit. The most important factor is water temperature. As temperature increases, water can hold less oxygen. Most low oxygen problems occur from June through September. The reasons for this are:
- Water can hold less oxygen as it becomes warmer.
- Respiration rates of both plants and animals increase with the warmer water, so more oxygen is used.
- Summer's still, hazy or cloudy days may reduce the amount of oxygen produced.
- Large amounts of feed given to fish at this time of year result in large quantities of fish waste which create a higher demand for oxygen.
