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Kasco Marine Robust Aire Systems

Pond or Lake Aeration Systems |Easy to install, maintain |Low operating costs |Fully Customizable

Robust Aire Specs  Robust Aire Brochure   Diffuser Assembly Instructions   SureSink Tubing Instructions   Short Install Video

  1. Click on the Sizing Chart 
  2. Determine the right size kit, choose with or with out a protective weather proof cabinet.
  3. See pricing charts below. Need a custom system?  We can design one for you and work up a proposal for free.

Robust-Aire Diffusers are the most efficient on the market and create more water flow to aerate your pond.The base is made of durable plastic and a locking fill plug which is filled with pea gravel gravel or similar weighted material. A check valve with Viton seals keeps water from entering the tubing when the system is not operating.

ra1-system.jpg robust-aire-underwater-lowr.gif ra4.jpg
No Cabinet (NC) Compressor must be kept out of the weather Post Mounted Cabinet (PM) Mountable on a wall or wooden post. Large Base Mount Cabinet Available for all systems

No Cabinet

Post Mount cabinet

Large cabinet



120 volt

240 volt

120 volt

240 volt

120 volt

240 volt


1 diffuser assembly
100' 3/8" Tubing
1 KM-60 compressor












2 diffuser assemblies
200' 3/8" Tubing
1 KM-60 compressor











3 diffuser assemblies
300' 3/8" Tubing
1 KM-120 compressor











4 diffuser assemblies
400' 3/8" Tubing
2 KM-60 compressors











5 diffuser assemblies
500' 3/8" Tubing
1 KM-60, 1 KM-120











6 diffuser assemblies
600' 3/8" Tubing
2 KM-120 compressors











Each system includes 100 feet per diffuser of 3/8” tubing, a $116.50 value.  If more SureSink tubing is desired, simply subtract $116.50 for each 100' from the price and add back the price of the desired length of tubing.  For tubing lengths over 300 feet for one diffuser run, use 5/8” Sure Sink tubing for that diffuser run.






Robust-Aire Diffuser Assembly



*SureSink Tubing Kit 3/8" (100')



*SureSink Tubing Kit 5/8" (100')



*Tubing Kits include all necessary fittings for attaching to the compressor, diffuser assembly, and for extending length on tubing runs.



RA1-RA3 Standard Kits Ship UPS | RA4-RA6 Standard Kits Ship Motor Freight | Ships with in 24-48hours | Delivered 3-5 business days.

Why use a Kasco Robust Aire System? • Better Water Quality • Bigger & Healthier Fish • Eliminate or Reduce Odors • Reduce Undesirable Algae  • The most efficient Pond Aerator Lake Bottom Aeration system on the market •

Advantages of using a Kasco Marine Robust-Aire System

  • No electricity in the water. This can be especially important where swimming is allowed.
  • No floating equipment at the surface. Boating is not hindered and the natural view of the lake can be enjoyed.
  • No electricity needed at the edge of the pond or lake. Robust-Aire can be remotely installed away from the water’s edge. Air can be delivered to the water’s edge instead of electricity. This can result in an installation cost savings. This option may be preferred where it is more convenient to have the compressor system consolidated with other equipment.
  • The Kasco Marine Robust-Aire Diffuser is more effective at aerating deeper waters than a floating fountain or high-volume surface aerator. Robust-Aire becomes effective at 8 feet of depth and increases efficiency with respect to water flow at the water deepens. Water is pumped directly from the bottom, all the way to the top. Robust-Aire compressors can inject air 50 feet deep!
  • The Kasco Marine Robust-Aire Aeration System is cost effective to purchase and operate for larger surface areas. These systems can effectively destratify and aerate deep lakes with much lower equipment costs and energy consumption. Robust-Aire systems are the most efficient on the market.
  • Low maintenance. Most maintenance and inspection may be conducted on shore. Rocking piston compressors do not require internal maintenance as often as other compressors.

Aeration is key to predictable performance from your pond. Your pond environment receives life-supporting oxygen from the atmosphere at the surface where the air and water contact each other, as well as from the photosynthesis of algae and plants below the water surface.    


These processes are both affected by weather: available wind energy (wave action) and sunlight. Weather is unpredictable and that can create stagnant water and low oxygen levels. When there is no sunlight, there is no photosynthesis to create oxygen. In stagnant water, there is no physical energy to help the water and air exchange gases and water forms well defined layers of different temperatures. Poor environmental conditions in the pond for fish and other organisms are the  result.    

Aeration dramatically improves environmental conditions in your pond and helps keep good water quality predictable. Beneficial bacteria reduce sludge and nutrients, and there are reduced incidences of undesirable algae and odors. Winter ice is not allowed to seal the pond surface and restrict oxygen and gas transfer. Aeration allows your fish to thrive in an optimal environment and fish populations experience improved growth rates and vigor.

Robust-Aire diffused air systems provide deep water aeration for ponds and lakes. Diffused aeration is an effective method of aeration for ponds with depths greater than 8 feet. By using compressed air injected directly into the bottom of pond, a continuous flow of water is moved upward and thousands of gallons of water are mixed with little expended energy. A Robust-Aire™ energy efficient compressor injects air to the bottom of your pond with weighted, SureSink™ air line and into the Robust-Aire diffuser assembly. The diffuser breaks up the air into micro bubbles which rise to the surface. The rising of the air bubbles creates current which transfers low-oxygen water to the surface, allows it to contact the atmosphere, and breathe. Temperature layers are disrupted and fish are able to inhabit the entire water column. Oxygen levels increase and harmful gases in the pond water are expelled.There is no disruption of the serenity of your pond setting, just the assurance that it is getting the oxygen that it needs.    

Custom Design Assistance

Is your situation unique? With combinations of systems, we can provide a design for almost any lake. Custom design assistance is available including a system layout on an aerial map of your pond or lake. To request a custom designed Robust-Aire system. Click here for a free proposal Request.

Robust-Aire Systems get Results!

Robust-Aire system resulted in a beautifully balanced lake with vigorous fish populations and less required maintenance. Take a moment and view how Robust-Aire transformed a 12 acre lake at Duck Valley.

Click here for indpendent study results….

"The day after the system was turned on, phosphorus levels on the bottom were decreased and the pond was chemically and thermally destratified." - Gordon Gotch, Assistant Biologist, Mac McGraw Wildlife

"The New Kasco RA unit was installed successfully at St. Francis Hospital. I believe this new bottom aeration unit will outperform every other bottom aeration unit on the market today based on price, quality, and ease of installation. I especially like the new diffuser head and small weighted air tubing!" - Installer in SC

Why should you choose teh Kasco Marine Robust-Aire Diffused aeration system?

Superior performance, thoughtful design, and professional assistance from an industry leader. That is why so many pond owners and water management professionals are choosing Robust-Aire.

See the short 2 minute Video for the Robust aire in action.

Another short 2 minute video of why Aeration is important


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