Shopping Cart (0)

Everything necessary for efficient windmill aeration systems. We've helped supply over 50,000 windmill aeration systems in North America with Koenders Windmills products.

Koenders Water Solutions has been in business for 25 years

We consult and work with pond owners, corporate businesses, municipal and federal governments, golf courses, fish farms and all others who have interests in saving the planets water through the use of sustainable, environmentally friendly processes and practises.

SAVING THE PLANET'S WATER, NATURE'S WAY

SINCE 1988

Featured Products

Nature's Pond Conditioner

Your pond is not only a conversation piece; it’s a statement about how you care. You’ve invested in a pond because you love and re...

From $39.95

Resources

Click the button below to view the installation and maintenance manuals and videos

View Manuals & Videos

Testimonials

Since I put my Koenders Windmill Aeration System in 6 years ago the difference in my pond water is night and day. I love my Koenders Windmill.

M Conrad - PA

We have owned our Koenders Windmill Aeration system for over 10 years and until recently have not had to do one thing to it. We just love the the quality of your product and it has done a fabulous job in keeping our pond water healthy and clean.

Robert Saxon - Rehoboth, MA

I have three Koenders windmill aeration systems, each one aerating a different fish pond. My neighbor also has 2 of them installed on his fish ponds. Ever since we installed these units we have never had fish kill offs, we have also never had to do any maintenance on these windmill aeration systems.

Chuck Westholter - Clear Lake, MN

I have seen such an improvement in the pond since doing all the repairs and treating it with Natures Pond Conditioner. This system is about 20+ years old and doesn't look like it has had much maintenance to it but is working very well. Thank you Koenders!!

Lyle Kummer - Sioux Falls, SD

I purchased a Koenders aerator windmill in 2006 for a 1/3 acre pond here close to Houston. It has worked perfectly for all these years. I would definitely recommend a Koenders windmill aerator to anyone who has a pond in order to keep it healthy.

Paul Jozwiak - Rosenberg, Texas

Done Nothing to Our Windmill For 15 Years!!! Our windmill has been aerating our 1/4 acre pond for over 15 years and it has been pretty well care free for this whole time. We swim and fish in our pond and the windmill aeration system has done a marvelous job of keeping the water clean.

Lewis Forrest - Arnprior, Ontario

I purchased a 16' windmill over the July 4th weekend and it's been up and running for about 3 weeks now. I was really impressed how well engineered it was and how everything fit and went together. So far I'm really impressed , happy and satisfied with your product. I'm looking forward to many years of reliable service from it.

Rick Wing

We have owned one of your windmill aeration systems for over 16 years and it has done a marvelous job of keeping our pond water clean and algae free. Really like the look of your windmill and the fact that it does a reliable job of keeping our water clean is a bonus!!

Mrs. Kenny - Mono, Ontario

We installed our Koenders Windmill in 2006 – it is used to aerate our 3/4 acre pond that is about 11 FT deep. Our pond is stocked with Bass, Blue Gill and Perch. The windmill has kept the fish healthy and alive during all seasons of the year, it also helps keep our pond water clean. Your product works great and we have never had a problem with it during all these years!

Bob Kocourek - Brillion, WI

We have been using a Koenders Windmill for over 7 years to aerate one of our settling ponds for compost. It has worked extremely well in eliminating the odors from the water and we have been so impressed with the results that we ordered 3 more Koenders Windmill aeration systems for our other 3 ponds.

Terrence Boyle - Antigonish, N.S.

I have to tell you we just love the fountain and the light kit. People are in awe of the light show at night coming from our pond. The fountain is so eye catching and relaxing to watch and listen to. We are so glad we added it to our windmill system. The windmill is great too and those hinges make raising and lowering the windmill a snap.

Mike Fletcher - Marintown, ON

We had used one of your pond aeration windmills for about 7 years on our dairy farm. We really noticed a difference right away, our milk production increased dramatically. We never had to do any maintenance to the windmill in the 7 years that we owned it. I highly recommend it to anyone.

Anne Friesen, Dairy Farm - Macgregor, Manitoba

We have been quite happy with our windmill aeration system from Koenders. It works well in aerating our 3-4 acre fish pond both in the summer and winter. For as large as our pond is the windmill has managed to keep our fish alive and an area water open during the winter months. Our pond is one of the cleanest in the area.

Brent Dennis - Troy, PA

We installed our windmill over 10 yrs ago and it is still working well. We primarily use the aeration to keep our fish alive, our pond is full of bass. Down here in Texas we are having one of the worst droughts ever and despit the hot temperatures, lower than ever water levels, our fish are thriving. Since installing our Koenders Windmill we have never had a bass die.

Joe Fuller - Gunter, TX

Koenders Windmill Aeration Works Great on Our Sewage Lagoons!! We bought 2 of your aeration windmills about 4 years ago to treat our sewage lagoon. They have worked great to get rid of the fouls smell and algae that we were having trouble with. We are very satisfied with the Koenders aeration windmills.

Huguette Lutz, Chief Administrative Officer - Town of Carlyle, SK

"Your aeration windmills have worked great to keep one of our municipal ponds open during the winter, maintaining it odor free and fish healthy. We purchased it about 3 years ago and haven't had any problems with it, we actually plan on using one your windmills for our sewage lagoon holding cells, to get rid of the algae."

Sandy Hintz, Mayor - Town of Wapella, SK

"We have been a Koenders Windmill customer for 25 Years. Our dugout water is used for our farm home and the windmill aeration keeps the water clean all year round. It is especially helpful during the winter months - we used to have smelly water in the house, but with the aeration we do not get that rotten egg smell in our water anymore."

Peter Starko - High River, Alberta

"Koenders Windmills are Built Tough!! We have owned our 20' windmill since Feb 2008, the mill has never needed maintenance. During Hurricane Ike we had to evacuate and I forgot to lower the windmill before we left. When we came back the neighbourhood was damaged but the windmill was fine and still pumping air despite being hit by 90+ Mph winds."

Mike Morgan - Orange, TX

"Our windmill is about 20 years old, during all this time we have only done maintenance on it twice. We have been using the windmill to aerate our fish pond. The aeration system has prevented any fish kills from ever occurring, even during the severe drought that we had in 2011 we didn't even lose a fish."

Marty Baecker - Rogers, TX

"We installed our windmill over 12 yrs ago and it has run practically maintenance Free. It has been doing a wonderful job in keeping our pond water clean and Fish healthy,Bass, Blue Gill and Catfish. Looking forward to trying your Natures Pond Conditioner - what an excellent alternative to the Pond Chemicals that are out on the market."

Paul Hutchins - La Motte, IA

"We Were able to use our Pond Water FOR Drinking!! People are amazed at how clean our water stays and come to visit our windmill system all the time. I am only now having to replace the maintenance repair kit in the compressor."

Bill Thompson - Wallacetown, Ontario

"We have owned the Koenders windmill aeration systems for a couple of years now and we have seen a significant improvement in the quality of our golf course pond water. The Koenders windmills have kept our water clear, algae free. We are very happy with the product, even more so that we don't have to use any dangerous chemicals to keep our water clean."

Carla Clarkson - Brandon, MB

"We have been using your aeration windmills for 2 years now and they definitely get the job done, in fact we have 6 Koenders windmills at our golf course. They keep the algae away and really that's all we have ever wanted. I would definitely recommend this method of keeping golf course ponds clean."

Matt Iannetta - HoneyBrook, PA

"Before installing your windmill we had fish kills and the pond was completely covered in Algae. Now with the Koenders windmill we haven't had any fish kills and the pond is now clear. Golfers are always interested to see how well the windmill is working, especially when you get 10 mph and higher winds, it really starts bubbling."

Darren Binggeli - Whiteman Air, MO

"Our windmill aeration system by Koenders was installed 20 years ago on our 1/2 Acre fish pond in Ontario. It has kept our pond open during the winter months and our fish healthy all year round. It has been a very effective and reliable way for us to do it for all these years."

Joan Chikinsky - Metcalfe, Ontario

"We have been using the Koenders windmill aeration systems to treat our 1 acre sewage lagoons for about 2 and half years now, we have been amazed by the results. We couldn't be happier with your product."

Sean DeHavilland - Mission Hills Community Services District

"We run a Camping Resort called Cozy Corners and installed a Koenders Windmill 15 years ago to keep our fish healthy and our pond clean. Your windmill aeration system works awesome!!! It keeps the moss off the pond and our fish alive. It has worked problem free for all these years."

Randy Bramlett - Clinton, MO

"19 Yrs with our windmill aeration system by Koenders and never had to perform maintenance except for one little screw adjustment. Amazing that for all these years I have never had to perform any maintenance - this unit has been pumping for all this time. Our fish also enjoy the added oxygen that the windmill gives them."

Wayne Sigsworth - Smithfalls, Ontario

"I built my own tower and mounted a Koenders double diaphragm windmill head with no trouble at all 3 years ago. I am able to aerate my minnow pond with three air stones and the past 3 years I've not experienced one fish kill. I run it year round and it works great."

Robert Marek - Cadott, WI

"We installed our Koenders Windmill over 14 years ago at the suggestion of the guy at the local Fish Farm. We have never had a fish kill. The pond also looks a lot nicer since we installed the windmill aeration. This product has been maintenance FREE for all this time eventhough they told us that we would need to do maintenance."

Terry Snyder - Bryant, Indiana

"We installed our windmill aeration systems on our Waste Water Treatment ponds in 2009. The windmills are being used to help clean the waste water so that we can re-use it in our manufacturing process. The product is performing as per expectations and we are happy that we made this choice for lagoon aeration."

Karl Smith - Innophos Corporation

"We have been using a Koenders Windmill aeration system to aerate our Farm Fish Pond for over 10 Years and it works great. We put 500 Trout into this pond each year and the windmill aeration keeps the water clean and algae FREE. It also keeps the fish healthy all year round. Thanks for helping make sure our fish are kept so healthy."

Irwin Gatzke - Warman, SK

"Koenders has helped us keep our pond water clean and welcome life like frogs and minnows abundant through our use of your Natures Pond Conditioner and the aeration windmill."

Bob Morrison - Bethany, Ontario

"We put it up in 2002 after we experienced a significant fish die off in the spring. Since putting it up, our fish are very happy. I am looking forward to your Pond Conditioner to see how it works."

Kathy Hutton - Hartland, MI

"Unbelievable!!!!! I was looking through my invoices from when I purchased our Koenders Windmills and it is exactly 12 years to the month and we have not done anything to them. We installed 2 of your Koenders Windmill aeration system to aerate our 18 Ft deep fish pond. The windmills keep the fish healthy and the algae and weeds down. Thanks for a such a great product."

Raymond Rady - Homestead County, OH

"Our Koenders Windmill aeration systems is one of the few things in life that you do not have to do a thing to once it is up and running. We installed this system over 7 years ago and it has done everything it promised and more. We have a 1/2 acre trout pond on our acreage and this windmill has kept the pond clean and fish healthy during all seasons."

Ron Hepperle - Millet, AB

"We have been using your windmill aeration system for 10 years and it has been maintenance Free. The Koenders Windmill Aeration system has kept our fish healthy and happy, we have perch that are over 13 inches long. This aeration method has been an excellent source of oxygen for the water and using this windmill allows us to do it with no energy costs. "

David Mitchell - Abrams, WI

"We bought a Koenders Windmill aertion system over 13 years ago and its kept our pond water nice and clean. We have never done a thing to our windmill, not even any of the maintenance that Koenders recommends, this must be a new record for product neglect and one that keeps working despite its lack of care. "

Tim Rokosz - Freeland, MI

"We have owned our windmill aeration system for almost 20 years and amazingly have not done a thing to it for all these years. It has kept our cattle drinking pond algae and weed free. We pump water up from this pond to a holding tank for our cattle to drink from. "

Dean Dowling - Swanton, OH

"We have a spring fed recreational pond about 1 acre in size that is full with fish. About 12 years ago we purchased our Koenders Windmill aeration system to ensure our pond does not stagnate. The windmill is doing a marvelous job of keeping our fish alive and the pond water clear. During the winter months it keeps a hole open in the ice to ensure the pond can vent off the gases caused by the decomposing of leafs and other matter, another key to keeping our fish healthy all year round."

Vincent Luczak - Fife Lake, MI

"We have been using a Koenders Windmill aeration system for over 7 years to aerate my 1/4 acre recreation pond in my back yard. It has been maintenance Free and the fish, frogs, and birds love it. I have 2 diffusers running off the one windmill and they are in about 16 FT of water. Thanks for a wonderful and reliable product. "

Gerhard Epp - Wheatly, Ontario

"I have owned my Koenders Windmill for 17 years and it has been working wonderfully ever since. A few years ago we had a terrible drought down here in Texas, our pond water level dropped from 9 Ft to 3 Ft. All the other pond owners in the area lost their fish, but we didn't lose any. I credit this to our Koenders Windmill Aeration System."

Dennis Scott - Livingston, TX

"My mother bought our windmill way back and it has been in service for over 20 years. It keeps my pond really clean and the fish healthy. We have never done anything to this windmill. It just keeps on working, in all seasons and in all winds. Quite amazing."

William Baker - Dillsboro, Indiana

"I am happy to say that since we installed the windmill we have had no issues with our pond. Our fish are healthy and we have clean pond water. We have not serviced the windmill for all these years, it just keeps on working. Great product!"

Mike Hinson - Troy, ID

"We have been very happy with our windmill. For over 10 years we have been using your windmill to pump water to irrigate our gardens and to aerate our ponds. Koenders you have built an excellent product that works very well. "

Keith Barrett - Plainfield, Ontario

"I would recommend the Koenders aeration system to anybody that is looking for something that is maintenance-free and does a good job. Absolutely."

Mark Pehlemann - Cash Crop Farm, Port Perry, Ontario

"The Koenders windmill aeration system is a fairly simple and beneficial way to achieve aeration for your pond and it gives you a good amount of oxygen into the water which helps prevent algae growth."

Karen Jeffrey - Fish Farm, Erin, Ontario

"Before installing our windmill aeration system we had experienced fish kills during the winter months. Our Koenders Windmill Aeration system has kept our pond open and fish healthy during the winter months and we have never had a fish kill since."

John Veriha - Marinette, WI

"I have had one of your Koenders Free Air windmills installed on our 2 acre fish Pond for over 8 years. Since we have installed this windmill aeration system I am pleased to say that we have never had one fish die."

Scott Ites - Iowa Falls, Iowa

"We have owned our windmill aeration system for 14 years and are amazed by the incredible job it is doing in keeping our pond healthy and clean. Our Koenders Windmill has removed and kept out 99% of the weeds and algae in our pond."

Robert Bergenstock - Lycoming, NY

"The combination of windmill aeration and your pond conditioner has cleaned up my pond and provided me with a pond maintenance program that is environmentally friendly, economical and extremely effective."

Jason Wilcox - Bartlett, NE

"You were right on about your product advice. I have been having problems with my pond for years. It has looked like the before picture every summer until this year. Thanks to you guys the combination of aeration along with your environmentally friendly bacteria and other ingredients has cleaned up my pond in record time. No more chemicals for me"

Jeff Stevenson - Katy, TX

"I started using Natures Pond Conditioner 2 years ago for my pond and it has worked better than any other treatment. Our pond gets a lot of sunshine and Natures Pond Conditioner not only shades it from the sun but it also provides it with the extra supplements it needs to keep it clean."

Lenore Smith - Bowmanville Ontario

"I could not be happier with the results, in 2 months you can see a marked improvement in the water quality. We have already had 2 ducks & a family of water fowl take up residence ... A happy customer"

Alan S. - Australia

"I would recommend the Koenders aeration system to anybody that is looking for something that is maintenance-free and does a good job. Absolutely."

Mark Pehlemann - Cash Crop Farm, Port Perry, Ontario

"Before installing our windmill aeration system we had experienced fish kills during the winter months. Our Koenders Windmill Aeration system has kept our pond open and fish healthy during the winter months and we have never had a fish kill since."

John Veriha - Marinette, WI

"I have had one of your Koenders Free Air windmills installed on our 2 acre fish Pond for over 8 years. Since we have installed this windmill aeration system I am pleased to say that we have never had one fish die."

Scott Ites - Iowa Falls, Iowa

"We have owned our windmill aeration system for 14 years and are amazed by the incredible job it is doing in keeping our pond healthy and clean. Our Koenders Windmill has removed and kept out 99% of the weeds and algae in our pond."

Robert Bergenstock - Lycoming, NY

"We have been using your windmills to aerate our 11 Acre Fish and Irrigation Pond for over 7 years. We have several of your Koenders Windmill aeration systems on the pond and it has served to keep the water algae and weed free. This assists us in irrigating our corn, hay and alfalfa fields by ensuring the irrigation pumps do not get clogged up."

Colby Edwards - University of Missouri

"We have been using your windmill aeration system on our 3 acre Fish Pond for over 16 years. It may be hard to believe but we have never had an issue with the windmill. Never taken it down for any maintenance, never even done any maintenance on it."

Charles Casey - Lacon, IL

"When we bought our windmill over 11 years ago there were none of these units around. Now, anyone in the area who has a pond also has a windmill, 50-100 of them in the region. A few of the neighbors have installed other brands but they clearly do not work as well as the Koenders Windmill which is what almost all of the pond owners have."

Kevin Armstrong - Ashton, Ontario

"We purchased a Koenders Electric Aerator - the EL2 unit over 10 years ago and it has been running 24/7 ever since. The only maintenance we have ever had to do is replace the diaphragm in it once. It keeps our pond/dugout water sparkling clear and is the water that we use for our cattle to drink from."

Alan Lewis - Taylor B.C.

"By placing 5 separate windmill systems on various ponds, the City has cost effectively solved the problem. The windmills have now been working for 1.5 years and the hydrogen sulfide smell has not been an issue once. Also, water quality is slowly improving. Overall, Koenders Windmills have been a great, cost effective solution for the City of Prineville."

City of Prineville, Oregon

"We have been using your windmill to aerate our fish pond for over 10 years. The year before purchasing the Koenders Windmill we had a large fish kill, never happened since we installed our windmill aeration system. It works very well in keeping the pond water open in the winter and the water clean in the summer."

Dirk Emde - Hanover, Ontario

"We bought our Koenders Windmill in 1990 and replaced the first diaphragm around 10 years later. Here it is 2013 and I am just replacing it again. Other than greasing the tower top every year it has needed nothing else. We have bass, bluegill and perch in our pond and the windmill keeps the water in real good shape and our fish healthy."

F Green - Troy Ohio

"Over 12 years ago we installed a Koenders Windmill to pump air into our 3/4 acre Brim and Bass Pond. Since installing the windmill we have had no issues with either it or the pond. Louisiana is not known for high winds, however, this windmill has worked so well in low winds that it has been an ideal solution to keep our fish healthy and our pond clean."

Kevin Bernard - Rayne, LA

"We are proud owners of 3 X Koenders Windmills. Two of which we have owned for 7 years - these units are aerating two of our bigger fish ponds. The 3rd Koenders Windmill is aerating our gold fish pond and has been doing so for over 14 years. These windmills have been working with no issue for all these years and they are so much fun to watch!!!"

Nancy Renfrew - Plummer, ID

"Just wanted you to know that your product is one of the few that I have ever bought that works the way it says it will. Nowadays, you never know what your going to get but I am so happy with your Koenders Windmill aeration system that I just bought another one for my other pond."

Chris Vice - Georgetown, ILL

"We have been a proud owner of an original Koenders Windmill for over 20 Yrs. It has aerated our Farm pond water that is used for both livestock and home use. By aerating the water we have avoided the smell that can come from these prairie ponds in the hot summer and cold winter months."

Dwayne Johnson - Tribune, SK

"We have had our fish pond for just over 5 years. The first few years we tried all sorts of different pond treatments that you find at the various retail stores. Then we came across Natures Pond Conditioner via a web search. We figured that we had nothing to lose at this point and for the last 3 years we have been using Natures Pond Conditioner. We Love IT!!"

Lenore Smith - Bowmanville, Ontario

"It may sound incredible but its true, we've had our windmill for 14 years and 10 years ago we had a straight line wind come through our property . It blew down my pull barn and ripped half the roof off my house. My windmill was still standing, didn't hurt it a bit. Should have known then that it would run for 14 years with no maintenance at all."

Audley Craig - Britton, MI

"We have been using Koenders Windmills for almost a decade to aerate two of our 1.5 acre farm ponds. They have worked real well, so well that my neighbor, Wally Walldrop, installed one for his farm pond a few years ago. We are so happy with the product that we just purchased two more 12 FT Koenders Windmill Aeration systems for our other 2 ponds."

Linden Rollyson - Dahinda, ILL

"We have used your windmill to aerate our fish pond for the last 15 years. This windmill is so sturdy and durable that is has even survived 3 hurricanes in the last several years with no damage. If anyone is every worried about the strength and sturdiness of these windmills and towers in severe storms tell them not to. They are an amazing product!!!"

Kevin and Darlene Norman - Youngsville, LA

"Our pond was brand new when we built it 14 years ago and one of the first things we did was to install a Koenders Windmill Aeration system. Our pond is 1 acre in size and we stock it with Rainbow Trout. It has kept the water clean and the fish healthy. The combination of Fish and Air is what has kept this water so clean, with no algae or sludge for so many years."

Neil Baird - Sing Hampton, Ontario

View All Testimonials