Pros and cons of dam aerators

Whilst there are many plants that help with pond aeration, anything above a small pond can benefit from using dam aerators to maintain the health of the pond. A lack of aeration can lead to low oxygen levels, fish kills and even algal blooms in severe cases, and the pond will look and smell unhealthy. At this point some form of water treatment is necessary and a dam aerator is the ideal dam cleaning solution.

Pros of using dam aerators

Essentially, aerators are designed to keep your pond healthy by circulating air throughout the water column. Unfortunately, this doesn’t happen naturally with most of the oxygen remaining in the surface layers of the water. Stratification then becomes a problem with organic matter collecting at the bottom, using all the oxygen and resulting in a build-up of toxins in the water. Dam cleaning then becomes necessary to remove the toxic sludge and some form of water treatment to remove the overgrowth of algae that can also occur.

Bottom dam aerators prevent this damaging cycle in its tracks, keeping oxygen levels as high as possible throughout the water column, circulating water from bottom to top; bottom sludge is minimized, toxins are circulated to the surface water and released into the atmosphere, and water quality and fish life are healthy.

Aeration also prevents fish kills that happen in large lakes when the lake water naturally turns over as the weather starts to cool down in the autumn. As the surface water temperatures drop to match the cooler bottom water, the whole water column mixes or turns over, bringing up the toxic sludge from the bottom and causing fish kills. Water treatment with aerators stops this build-up of sludge, so even though the lake still turns over, the fish remain healthy.

Cons of using dam aerators

The main problem with dam aerators is the initial cost of  purchase and set up, followed by on-going maintenance. The costs will depend on the size of the water body and number of aerators needed, but for the practicalities of dam cleaning, they tick all the boxes. You need to remember however, that even with an aerator you might still have a fish kill or an alga bloom. This is because an overly productive lake with lots of bottom sludge can quickly become toxic due to the rapid decomposition of so much organic debris. It’s this toxic sludge, rather than a lack of oxygen that can result in the occasional fish kill.

For more information on water treatment for your lake, pond or dam, call BioRemedy on 1300 798 022 or send us an email.