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How To Stop Pond Water Turning Brown

How To Stop Pond Water Turning Brown

As the seasons change, you may notice that your pond water is turning a murky brown colour. We know that this can be frustrating for pond owners, but don't worry - there are several reasons why this can happen and steps you can take to fix it. Read on to find out.

Reason 1: Organic Debris

One of the most common causes of brown pond water is the accumulation of organic debris, especially in Autumn. This can include fallen leaves, dead plants, and fish waste, which can all break down over time and cause the water to become discoloured.


To prevent this from happening, make sure to regularly clean your pond and remove any debris that has accumulated. You can also use netting or a pond skimmer to help collect any floating debris.

Reason 2: Algae

Another potential cause of brown pond water is the presence of algae. Algae can grow quickly in warm, nutrient-rich water, especially during the summer months in Australia.

To control algae growth, make sure to keep your pond well-aerated and avoid overfeeding your fish, if you have any. You can also use an algaecide to help eliminate any existing algae in your pond.

Reason 3: Anaerobic Bacteria

If your pond water is brown and has an off odour, it could be a sign of anaerobic bacteria growth. This can happen if your pond is not properly aerated, allowing bacteria to thrive and release gases that can cause a strong smell.


To fix this, consider installing a fountain or waterfall to increase oxygen levels in your pond.

Reason 4: Bacterial Bloom

Lastly, if your pond water is brown and cloudy, it could be a sign of a bacterial bloom. This happens when there is an excess of nutrients in the water, which can cause bacteria to grow rapidly and make the water appear murky.


To fix this, you can try adding a bacterial treatment to your pond to help balance the water's nutrient levels.

There are several reasons why your pond water may turn brown, but with some basic maintenance and preventative measures, you can keep your pond water clear and healthy. By regularly cleaning your pond, controlling algae growth, increasing oxygen levels, and monitoring nutrient levels, you can ensure that your pond remains a beautiful and enjoyable addition to your outdoor space all year round.

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