Charles Austen CP Series Air Pumps
Battery Backup Aeration for Ponds, Aquaculture and Sewage Treatment Systems
The Charles Austen CP Series is a specialist range of air pumps designed to provide reliable aeration with automatic battery backup protection. These pumps are widely used in ponds, aquaculture systems and wastewater treatment plants where maintaining oxygen supply during a power failure is critical.
Unlike standard aeration pumps, the CP Series includes an integrated rechargeable battery system. During normal operation the pump runs on mains electricity, but if the power supply fails the unit automatically switches to battery power and continues delivering airflow. This helps maintain oxygen levels and protects fish, filtration bacteria and treatment processes until electricity is restored.
This type of emergency aeration is particularly important in koi ponds, fish transport systems and biological treatment plants where oxygen levels can drop quickly if pumps stop running.
Reliable Aeration with Automatic Battery Backup
Power outages can cause serious problems for ponds and treatment systems. Circulation pumps stop, filtration slows down and oxygen levels begin to fall.
The Charles Austen CP Series helps protect against this risk. The built in battery automatically activates when mains power is lost, allowing the pump to continue aerating the system without interruption.
Depending on the airflow setting and the model used, the internal battery can provide several hours of emergency aeration. This gives valuable protection during short power outages and helps safeguard fish stocks and biological filtration.
Once electricity returns, the pump automatically switches back to mains power and begins recharging the battery.
Adjustable Airflow for Different Systems
The CP Series also features adjustable airflow control. This allows the output to be tuned depending on the application.
Lower airflow settings can be used for smaller ponds or to extend battery runtime during emergencies. Higher airflow settings provide stronger aeration for larger ponds, fish holding tanks and biological filtration systems.
Because of this flexibility, CP air pumps are commonly used in:
- Garden ponds and koi ponds
- Fish transport containers and holding tanks
- Aquaculture systems and hatcheries
- Moving bed biological filters
- Sewage treatment plants and wastewater systems
Choosing the Right Charles Austen CP Pump
The CP Series includes models designed to suit different aeration requirements.
The CP60 produces up to 60 litres per minute of airflow and is commonly used for medium sized ponds, fish transport systems and compact aeration systems.
The CP120 delivers up to 120 litres per minute through dual outlets, making it suitable for larger ponds, aquaculture tanks and wastewater treatment systems requiring stronger airflow.
Both models include the same battery backup protection and adjustable airflow control.
Why Choose a Charles Austen CP Air Pump
The CP Series is designed for systems where reliable aeration is essential and interruptions cannot be risked.
Key advantages include:
- Automatic battery backup during power cuts
- Adjustable airflow to suit different pond sizes and systems
- Oil free diaphragm technology for clean air delivery
- Quiet operation suitable for residential environments
- Portable design with integrated carry handle
- Reliable continuous duty performance
Charles Austen air pumps are widely trusted across the pond, aquaculture and wastewater industries thanks to their durability, quiet operation and serviceable design.
Expert Advice from That Pond Guy
At That Pond Guy we install and maintain pond aeration systems every week, from small wildlife ponds to large koi ponds and lake aeration systems. This means we can help you choose the correct air pump for your pond, filtration system or treatment plant.
If you are unsure which CP model is suitable for your setup, feel free to contact our team and we will be happy to help you select the right aeration solution.
Charles Austen CP Series Air Pumps – Frequently Asked Questions
What is the Charles Austen CP Series air pump?
The Charles Austen CP Series is a range of linear diaphragm air pumps designed to provide reliable aeration with built in battery backup protection. These pumps are commonly used in ponds, aquaculture systems and sewage treatment plants where maintaining oxygen supply during a power cut is critical.
During normal operation the pump runs on mains electricity. If the power supply fails, the pump automatically switches to its internal rechargeable battery and continues delivering air. This helps maintain oxygen levels and protect fish, biological filtration and treatment systems until electricity is restored.
Why is battery backup important for pond aeration?
Oxygen levels in ponds can drop quickly if aeration stops. During a power outage circulation pumps and air pumps may stop running, which can cause dissolved oxygen levels to fall rapidly.
This is particularly risky in koi ponds or heavily stocked systems where fish require higher oxygen levels. A battery backup air pump helps maintain oxygen supply during these situations and protects fish until normal power returns.
How does the CP Series battery backup system work?
The CP Series includes an internal rechargeable battery which automatically charges while the pump is operating on mains electricity.
If the power supply fails the pump immediately switches to battery power without requiring any manual intervention. This allows the pump to continue delivering air to the pond, tank or treatment system.
Once electricity returns the pump automatically switches back to mains operation and the battery begins recharging.
How long will the CP Series run during a power cut?
Battery runtime depends on the airflow setting and the pump model. In typical conditions the internal battery can provide several hours of emergency aeration.
Lower airflow settings can extend battery runtime while higher airflow settings may reduce it slightly. Even a few hours of emergency aeration can significantly reduce the risk of oxygen depletion during shorter power outages.
What are Charles Austen CP air pumps commonly used for?
CP air pumps are used in a wide range of aeration applications including ponds, aquaculture systems and wastewater treatment plants.
Typical uses include koi ponds, ornamental ponds, fish transport tanks, aquaculture systems, moving bed biological filters and sewage treatment plants. The battery backup system makes them particularly useful where continuous aeration is essential.
Are CP Series air pumps suitable for koi ponds?
Yes. The CP Series is particularly useful for koi ponds where maintaining stable oxygen levels is important.
Koi ponds often contain higher fish stocking levels and therefore require strong aeration. If aeration stops during a power cut oxygen levels can drop quickly. A CP air pump helps maintain oxygen levels during these situations and protects valuable fish.
Can CP pumps be used as emergency aeration systems?
Yes. Many pond keepers install CP pumps specifically as emergency aeration systems.
If filtration pumps stop during a power outage the battery powered air pump continues delivering oxygen into the pond. This helps maintain circulation and oxygen levels until electricity is restored.
Are air pumps good for ponds?
Yes. Air pumps are an important part of many pond systems because they increase dissolved oxygen levels and improve water circulation.
Higher oxygen levels support fish health and encourage beneficial bacteria that break down ammonia and nitrite in filtration systems. Aeration can also help reduce stagnant areas within the pond.
Does a pond aerator really work?
Yes. Pond aerators work by pushing air through air stones or diffusers which release bubbles into the water.
As the bubbles rise they transfer oxygen into the water and create gentle circulation. This process improves oxygen levels, supports biological filtration and helps maintain a healthier pond environment.
What is the cheapest way to oxygenate a pond?
Using an air pump with air stones or diffusers is usually the most affordable way to oxygenate a pond.
Air pumps are relatively inexpensive to purchase and run, and they can significantly improve oxygen levels and circulation. For ponds that require emergency protection, battery backup air pumps provide additional security during power cuts.
What size air pump do I need for my pond?
The correct pump size depends on pond volume, pond depth, fish stocking levels and the aeration equipment being used.
Smaller pumps may be suitable for wildlife ponds or lightly stocked garden ponds. Larger koi ponds or filtration systems often require higher airflow pumps to maintain adequate oxygen levels.
Choosing a slightly larger pump can help ensure reliable aeration.
How many hours a day should a pond aerator run?
Most pond aerators are designed to run continuously and should normally operate twenty four hours a day.
Continuous aeration helps maintain stable oxygen levels and supports biological filtration. Turning aeration off for long periods can reduce oxygen levels and affect fish health.
Do I need to oxygenate my pond in winter?
Aeration is still beneficial during winter but airflow may sometimes be reduced depending on pond conditions.
Aeration helps maintain gas exchange and can prevent harmful gases building up under ice. However, in very cold weather it is often best to position air stones slightly higher in the pond rather than directly on the bottom.
Can CP pumps run multiple air stones or diffusers?
Yes. CP pumps can operate multiple air stones or diffusers when connected using airline manifolds or splitters.
The number of diffusers that can be used depends on the airflow output of the pump. Larger pumps such as the CP120 can support larger aeration systems or several diffusers.
Can CP pumps power moving bed filters?
Yes. CP pumps are commonly used to power moving bed biological filters.
Moving bed filters require constant aeration to circulate biological media inside the filter chamber. This movement allows beneficial bacteria to grow and efficiently break down ammonia and nitrite.
Can CP pumps be used for fish transport?
Yes. The CP Series is often used for transporting fish.
Maintaining oxygen levels inside transport tanks or vats is essential for fish health. The built in battery backup allows the pump to continue operating even when mains electricity is not available.
Are CP pumps suitable for aquaculture systems?
Yes. CP pumps are widely used in aquaculture systems including fish farms and hatcheries.
Reliable aeration helps maintain stable oxygen levels which support fish health and growth. Continuous oxygen supply is also important for maintaining water quality in recirculating aquaculture systems.
Are CP air pumps suitable for sewage treatment plants?
Yes. CP pumps can be used in sewage treatment plants and wastewater treatment systems.
These systems rely on aerobic bacteria to break down organic waste. Aerobic bacteria require oxygen to function effectively, which means aeration must run continuously.
The battery backup system helps maintain aeration if electrical supply is interrupted.
Can CP pumps improve sewage treatment efficiency?
Yes. Proper aeration helps support aerobic bacteria which break down organic waste in treatment systems.
Stable oxygen supply improves biological activity and helps maintain effective treatment performance.
How quiet are Charles Austen CP air pumps?
CP pumps are designed to operate quietly despite producing strong airflow. Noise levels are typically around 35 decibels depending on the airflow setting.
This makes them suitable for residential garden ponds and indoor installations.
Where should a CP air pump be installed?
Air pumps should be installed on a stable surface in a well ventilated location. It is generally recommended to position the pump slightly above water level where possible.
This helps prevent water flowing backwards through the airline and protects the pump.
Are Charles Austen CP pumps oil free?
Yes. CP pumps use oil free diaphragm technology which delivers clean air into ponds or treatment systems.
Oil free operation is important for aquatic environments because it prevents contamination of water and biological filtration systems.
What maintenance does a CP Series air pump require?
CP pumps are designed to be low maintenance but like all diaphragm air pumps some parts will gradually wear over time.
Charles Austen recommends servicing the pump approximately every eighteen months using a service kit which includes replacement diaphragms and other essential components.
What happens if a pond air pump stops working?
If aeration stops for long periods oxygen levels may begin to fall. This can lead to fish stress and reduced biological filtration efficiency.
In sewage treatment systems aeration failure can also affect treatment performance. For this reason reliable air pumps and backup aeration systems are important.
Can aeration help improve pond water quality?
Yes. Aeration helps improve water quality by increasing oxygen levels and supporting beneficial bacteria that break down waste.
Improved circulation also helps prevent stagnant areas and supports a healthier pond ecosystem.
How long can koi survive without oxygen?
Koi can only survive a limited time without sufficient oxygen. In warm water or heavily stocked ponds oxygen levels can drop to dangerous levels within a few hours if aeration stops.
This is why many koi pond owners install emergency aeration systems or battery backup air pumps. Maintaining oxygen circulation during a power outage can make the difference between fish surviving or becoming stressed.
What happens to a pond during a power cut?
During a power cut several things may stop working at the same time including filtration pumps, circulation pumps and aeration systems.
When water movement stops oxygen levels begin to fall while waste products continue to build up. In heavily stocked ponds this can quickly create stressful conditions for fish. Emergency aeration pumps such as the Charles Austen CP Series help maintain oxygen levels during these situations.
Do koi ponds need aeration at night?
Yes. Oxygen demand in ponds can actually increase during the night.
Plants and algae produce oxygen during daylight hours through photosynthesis. At night they consume oxygen instead. In heavily stocked koi ponds this can reduce oxygen levels, which is why many pond keepers run aeration systems continuously.
Can too much aeration harm fish?
In most pond systems it is very difficult to add too much aeration. Fish generally benefit from higher oxygen levels and improved circulation.
However extremely strong aeration in very small ponds could create excessive turbulence. Using adjustable airflow pumps such as the CP Series allows aeration to be balanced for the size of the pond.
Does aeration help reduce algae in ponds?
Aeration does not directly kill algae, but it can help improve the overall balance of a pond ecosystem.
Improved oxygen levels support beneficial bacteria which break down nutrients that algae rely on. Aeration also improves water circulation which can reduce stagnant areas where algae tends to grow.
Can aeration help fish during hot weather?
Yes. Warm water holds less dissolved oxygen than cold water, which means fish may struggle for oxygen during hot weather.
Aeration increases oxygen exchange at the water surface and helps maintain stable oxygen levels. For this reason many pond keepers increase aeration during the summer months.
Can a battery backup air pump save fish during a power cut?
Yes. A battery backup air pump can provide emergency aeration during a power failure.
Even a few hours of oxygen circulation can help maintain dissolved oxygen levels and prevent fish from becoming stressed. This is why backup aeration systems are commonly used in koi ponds, aquaculture systems and fish transport tanks.
How deep should pond air stones be placed?
Air stones or diffusers are typically placed near the bottom of the pond to maximise oxygen transfer and circulation.
However in colder weather some pond keepers position air stones slightly higher in the pond to prevent disturbing warmer water layers at the bottom.
Can aeration improve pond filtration?
Yes. Aeration supports the beneficial bacteria responsible for breaking down ammonia and nitrite in biological filters.
These bacteria require oxygen to function effectively. Increasing oxygen supply can therefore help improve the efficiency of biological filtration systems.
Do wildlife ponds need aeration?
Many wildlife ponds can operate naturally without mechanical aeration, especially if fish stocking levels are low.
However aeration can still be beneficial in warmer weather or in ponds where organic waste begins to build up. Gentle aeration can help maintain oxygen levels and improve water movement.
