Oxygen is the most important element for life.  All aquatic life forms require oxygen. From the fish down to the bacteria any body of water has what is called an “oxygen demand”. Of all the essential elements in water, oxygen is also in the shortest supply. The air we breathe is 21% oxygen. Water can only hold about 8 parts per million (mg/liter) or 0.0008% at 20 degrees Celsius. Oxygen does not like water. It does not take long for oxygen to be depleted; it is our job to make sure it is replenished continuously. Our fish depend on us.

Ponds and lakes gain oxygen in two ways. 1) Photosynthesis by algae and plants. 2) Atmospheric oxygen is transferred into water at the surface of pond. Photosynthesis may produce sufficient oxygen for very low fish loads but is inconsistent due to the fact that at night algae and plants remove oxygen through the process of respiration. Most of the ponds and lakes we deal with have higher than natural fish loads and require additional oxygen to maintain a clean and healthy environment. To properly aerate ponds and lakes we must increase the available surface area and improve circulation to increase the transfer of atmospheric oxygen into the water. Surface turbulence increases the available surface area in contact with the atmosphere and allows increased transfer of oxygen. Increased circulation evenly distributes the oxygen to all zones within the pond. All techniques we employ to aerate a body of water focus on increasing the surface turbulence and thus increasing the surface area for oxygen transfer. Most of these techniques also improve circulation.” (data supplied by Hakko Air Pumps)

Hakko 40L Aerator

• Suitable for koi ponds up to 4,000 gallons
• Delivers a maximum of 70 Liters Per Minute, and only uses 40 watts.
• Ideal for water depths between 2 feet to 10 feet deep.
• Shut off depth is 14 feet deep.

Hakko 60L Aerator

• Suitable for koi ponds up to 6000 gallons.
• Delivers a maximum of 82 Liters Per Minute, and only uses 63 watts.
•  Ideal water depths between 2 feet to 12 feet.
• Shut off depth is 18 feet deep.

Air Diffusers

Rubber Membrane Diffusers are considered to be one of the most economical and low maintenance air diffusers available. The rubber membrane has many small holes which expand as air fills the membrane. Medium size bubbles are released. The rubber membrane does not clog like air stones. Little or no maintenance is required. Th9″ e Matala Rubber Membrane Diffusers are designed to be very low back pressure so you also get the best performance from your Hakko air pump. The air pore size in the rubber membrane is designed to give a medium size bubble which will not put any significant back pressure on the system.  The 9 inch disc is capable of handling air flows of 25 lpm to 100.
The air disc is very low maintenance and in most cases NO maintenance. Simply wash the disc with clean water and bleach if it ever needs cleaning.  The air diffuser assembly features a hollow base that can be filled with sand or gravel. This eliminates the need for bricks and straps to get the diffuser to sink. Aqualine has been using the diffuser disc assemblies  in our ponds for many years with very little maintenance required.

Hakko Diaphragm Kit

The diaphragms in a Hakko air pump should be replaced every 1-2 years for optimum utilization. The rebuild diaphragm kits are simple to install. They include diaphragms to fix both sides. Note: If your diaphragms are blowing out frequently, you most likely have an excess back pressure problem in your design. Check that your air delivery hose is large diameter and no kinking is occurring. Check your air diffusers for clogging. Ceramic style air stones need cleaning with muriatic acid every 3 months typically. Check that the number of air diffusers is sufficient to handle the air output of your Hakko pump. Too few diffusers will create excess back pressure.

Hakko Diaphragm Replacement Instructions

Kasco Teich-Aire Rocking Piston Compressors

Note: 1 acre = 43,560 square feet or 4,047 square metres.
The Kasco Piston Pump Air Compressors are designed and built to meet the demands of continuous-duty, year-round, large aeration applications. Each unit includes a pressure relief valve, vibration mounts, intake air filter assembly, and brass hose fitting for easy implementation into your existing system. Each compressor is oil-less, quiet operation,  6 ft. power cord, thermal overload protection, and a ramped internal valve plate that allows for restart under load after power failures. COMPRESSOR MUST BE USED WITH COOLING FAN

The KASCO KM-60 1/4 hp PISTON PUMP 3.7cfm is designed to be efficient in ponds 5-30 feet deep, uses 2.4 amps, and is perfect for aerating ponds under 1 acre size. This pump can run two large diffusers in water up to 20 feet deep.

The KASCO KM-120 1/2 hp PISTON PUMP 5.1 cfm is designed to be efficient in ponds 5-30 feet deep, uses 3.5 amps and is perfect for aerating ponds up to 2 acres in size. This pump can run up to three large diffusers in water up to 20 feet deep.

Weighted Airline Hose

• Self-weighted hose = faster, easier installations.
• designed to sink to the bottom of your pond without additional weight
• The black color easily disguises it on the pond bottom
• PVC composite = no dangerous lead in the eco-system.
• Flexible under any conditions.
• Heavy duty wall thickness for protection against cuts, crushing by ice in winter, etc.
• Available in 3/8?, 1/2? and 5/8? ID.

Aquascape 2-outlet Aerator

• Extremely energy-efficient; Quiet
• Simple to use and maintain
• Durable outer housing prevents damage
• Comes complete with winter resistant air line, preassembled check valves and  2 circular weighted air stones

Aquascape 4-outlet Aerator

• Extremely energy-efficient; Quiet
• Simple to use and maintain
• Durable outer housing prevents damage
• Comes complete with winter resistant air line, preassembled check valves and  4 circular weighted air stones