Nature's Pond Care by Koenders Water Solutions Inc.


What is Aeration?

Aeration is the process of adding oxygen to water. It is a key component to any pond owners’ success in keeping their ponds healthy and clean. Different types of bottom up and surface aeration systems work to infuse bodies of water with oxygen to improve pond health.

Why you should Aerate your Pond

Adequate levels of oxygen are required to support life within the pond ecosystem. Fish need oxygen the same way we do, the main cause of fish kill in ponds is due to a lack of oxygen. Bacteria also require oxygen to allow respiration. Bacteria play a key role in ponds to break down organic matter in the water to reduce muck and sludge from settling on the bottom of ponds.

Surface Aeration

Fountains and bubblers are two types of surface aeration systems that work by agitating the surface of the pond to mix oxygen into the top layer of the water. Fountains pump water into the air, creating small droplets that collect oxygen from the atmosphere and fall back into the water. Bubblers or jets work in a similar way, by bubbling and mixing the surface of the water, catching air from the atmosphere and infusing it into the top layer of water.

Surface aeration will help control top level algae and weeds but they do not aerate down to the bottom of the pond where oxygen is needed most. Typically, water at the bottom of ponds is colder and contains less oxygen naturally, this is occurrence is called thermal stratification and it can put your fish at risk. If a pond is stratified fish will hang around the top layers of a pond where there is more oxygen. But, if a wind or rain storm occurs and the stratified water is mixed it can cause a mass fish kill because the destratification will mix the oxygenated water with the depleted bottom layers, lowering the overall oxygen content.

The bottom of ponds is also where dead organic matter such as weeds algae and other nutrient waste sink down to decay. If there is no oxygen at the bottom of the pond to support the bacteria breaking down waste, a build up of muck and sludge will occur and require costly dredging to remove.

You can see how surface aerators are an ineffective solution to keep ponds clean and healthy.

Bottom Up Aeration

Bottom up Aeration systems are 5-10 times more effective than surface aeration. These systems work by compressing oxygen and pumping it into the water through diffusers that lie at the bottom of a pond, lake, or dugout.  Small bubbles are diffused into the deepest section of the pond, and as they rise up the water column, oxygen is transferred across the surface of the bubbles and into the water. This achieves total pond aeration from the bottom, up to the top regardless of the depth of the water.

The bottom up motion mixes the water, reducing thermal stratification. Oxygen is equally dispersed at the bottom and top layers of the water which minimizes the risk of fish kill. The high oxygen levels support bacteria, providing them energy for respiration to consume decaying organic matter. This cleans the pond water, improving health and colour as well as reduces the amount of muck and sludge. Algae and weeds are also kept at bay.

Bottom up aeration systems are also less costly to operate than surface aeration. The power that it takes to pump water up is much more significant than what it takes to pump air down, causing surface aeration systems to cost 2-3 times more than bottom up aeration systems to operate. Bottom up aeration systems can also be powered by windmills, which are better for the environment and have zero operating costs, using only the power of the wind.

Studies have shown that bottom up aeration can have an oxygen transfer rate up to 10 times more than surface aeration. For example, at 10ft of water up to 16% of the oxygen diffused can be dissolved into the water using bottom up aeration; at 15ft over 20% can be dissolved. The oxygen transfer rate using surface aeration typically ranges between 1.6 and 3.2%

In conclusion, you can see below that bottom up aeration is the clear winner for treating ponds efficiently and effectively.


Share this article

Recent Posts

Maintaining Septic Tanks and Sewer Lines: Experts Share Their Best Advice

Maintaining Septic Tanks and Sewer Lines: Experts Share Their Best Advice

Nature's Pond had the opportunity to give our expert advice on maintaining septic tanks on a blog article posted by Here is the complete article.

What Makes Nature’s Pond Conditioner Work?

THE SCIENCE BEHIND NATURE'S POND CONDITIONER Nature’s Pond Conditioner was created to reduce the effort, complexity, and annual expense of caring for bodies of water. As a company, we are forever committed to providing products that are safe for all and environmentally friendly. But what makes our Nature’s Pond Conditioner work and what makes it different from chemical-based approaches?

6 Things Everyone with a Pond Should Do to Get Ready for Spring and Summer

6 Things Everyone with a Pond Should Do to Get Ready for Spring and Summer

Spring is here, and summer is just around the corner.…

Koenders Helps Orphan Home in Cambodia

Koenders Helps Orphan Home in Cambodia

Koenders windmills can be found aerating ponds all over the world, improving water quality for many different functions. In Cambodia you can find a Koenders Windmill helping two amazing missionaries finance their orphan home.

Water Quality Impacts Livestock Health and Weight Gains

Water Quality Impacts Livestock Health and Weight Gains

Water is essential for livestock production and research has shown that water quality can affect livestock performance. Studies show that livestock with access to clean water are healthier, will drink and eat more, and ultimately gain weight quicker.

Nature's Pond™ 3-Step Natural Pond Care Program


Our All-in-One Pond Conditioner is simply the most effective, natural product on the market for achieving clean, clear, and healthy water.


Increase oxygen levels with Bottom-Up Aeration. It's a safe, natural and sustainable way to keep your pond or lake healthy and balanced.


Introducing Nature's Pond Cutter 'N' Rake, a 3-in-1 tool that cuts weeds and pulls and rakes them out of your water for good.