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Quick and Easy Pond Treatment for Algae

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Pond algae is a problem that all pond owners will face at one time or another. In this quick post, we’ll break down what causes the algae to form in the first place, the common types of algae you’re likely to deal with and some of the best preventions and solutions such as the  Aquamidas FreshaTank.

Cause of Pond Algae

The cause of the dreaded green waters in fish ponds or garden water features, come from a tiny single-cell called algae. There are various types of algae that are found in waters, however they are commonly caused by a nutrient imbalance with the pond water. The algae live suspended within the water, until it is fuelled by the perfect conditions such as increases in sunlight, temperature and nutrients. Hence, the pond algae being increasingly likely in the spring and summer months and can grow extensively, very quickly.

So, the main culprit for the dirty green pond water is from the presence of high levels of nitrate. Nitrate is naturally formed through the breakdown of dead plant decay, fish food and fish faeces. Therefore, although having enjoyable fish such as Koi and Goldfish in ponds, their waste is the highest cause of nitrate breakdown which feeds the pond algae. That is not saying, do not have the enjoyable creatures within gardens, but to be conscious on the effects different fish breeds may have to waters.

If you are experiencing algae within the waters and do not have these breeds of fish in the ponds. Another common cause can be a too high fish population. Again, this increases nitrate levels within the water, in turn increasing the feed supply for the algae.

Experiencing algae in newly built ponds is another common factor, this is caused by the water chemistry and plant physiology not yet reaching a sustainable level. In time, the water will maintain a constant level and water features will start to become immune to algae growth.

Finally, additional effects on green pond water can also be caused by low levels of CH value, high levels of pH values and stagnated oxygen producing plants. These causes can be from, pond debray build up overtime causing sludge and organic matter at the bottom of the pond. These problems within the waters can be fixed from the following pond algae solutions.

Types of Pond Algae

Firstly, it is important to understand the effects of algae has on the water as well as realise there are different types of pond algae.  Algae is a primitive plant that, via photosynthesis uses water and carbon dioxide to sugars and energy. However during the night, when there is no sunlight, the plant begins to respire. This respiration uses stored sugars and oxygen to form carbon dioxide, in turn, depleting the oxygen in the pond.

The reason for understanding the pond algae respiration cycles and the various types, is to ensure the correct and most efficient method is used to get rid of the algae in your pond.

  • Green Water Algae

This is the most common form of algae in pond and lake ecosystems, and the first form of food being at the bottom of the food chain. The green algae provides food for fish, insects and waterfowl. However, too much of this algae can result in eutrophication, resulting in depleted oxygen water levels and the death of any pond inhabitants.

  • Blue Water Algae

Blue algae is not a true algae, however it is a similar bacteria that looks distinctly like algae. Its called cyanobacteria, as it prefers shallow, warm still, nutrient rich waters. It is identified by the scum dense floating mats on the water surface and can range in colour from green, purple, brown and blue. The distinct characteristic is the strong unpleasant smell, this indicates there is a cyanobacteria problem within the pond water.

  • String Algae

String Algae, also known as filamentous algae are single celled organisms that form together in, yes, a long string! These long strings intertwine together and form thick mats. The algae begins to grow firstly on rocks and substrate at the bottom of the pond. Once fully formed the algae rises to the top of the water as it links and grows together. The colour of string algae is commonly green, however it can be seen in shades of yellow and brown. Some common filamentous algae species are blanketweed or watersilk, horsehair algae and cotton algae.

How to get rid of Pond Algae Naturally

  • Cultural Pond Solutions for Algae

There are cultural measures for fish pond water treatment that consist of practices that can be done all year round.

A first, simple method is to  add plants. In a natural setting plants leave very little nutrients for algae to thrive. The best plant for the job is oxygenating surface plants. By adding floating plants such as lilies and lotus, provide shade and reduce direct sunlight in the pond to control the growth of algae. Add submerged plants too - the recommended would be anacharis, hornort and parrot’s feather, these plants release oxygen into the water which avoid a stagnant environment.

An additional solution would be a Polywool, wool or floss filter media. This is useful for removing any debray or decay that can increase nitrates, in turn creating food for algae and bacteria. By using an ultra fine media material it is a useful way of removing very small particles that make waters look dirty. It is designed to trap any free swimming debris, you can also add the materials to your filter back alongside your regular media to hence great results.

  • Chemical Pond Solutions for Algae

There are many chemical controls for treating various types of pond algae. However, not all are beneficial to the water by protecting and non harmful to our ecosystem. For best results on how to get rid of algae in ponds naturally and environmentally you can use something like the  Aquamidas FreshaTank. Aquamidas products are created to keep water fresh and pure for longer. The products are manufactured to a high quality with rigorous testing to maintain healthy waters whilst the company also offers unbeatable customer service and even same day delivery. The Aquamidas FreshaTank, is a product uniquely designed to reduce nitrates which feeds any types of pond algae and is ideal against any single cell algae. It is a recommended fish pond water treatment as it additionally benefits fish health by preventing the spread of disease and bacteria levels. FreshaTank additionally neutralise the levels of ammonia in fish pond water creating a safe and healthy environment for fish, as well as being a leading pond algae solution. You can find the FreshaTank and other Aquamidas products on Amazon.

Preventing Pond Water Algae

In the end, the best pond treatment for algae is to be efficient before the algae begins to over power waters. No pond will ever be totally algae free, however it is best to keep the pond waters in a healthy, balanced environment. Ensuring ponds are clean with no more than ¼ inch of debris buildup will not require any need of physical debris removal, this will prevent the chances of algae growth. Additionally, using regular bacteria and nutrient fish pond water treatments such as FreshaTank will be an appropriate prevention and cure. It’s recommended to use in addition to incorporating oxygenating plants to help prevent any algae occurrence in the first place.


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