Ultrasonic algae control

Interactive frequencies

Unlike conventional systems that use a broad spectrum frequency, LG Sonic ultrasonic algae control adjusts the frequency based on the algal species. This prevents ultrasound resistance and improves effectiveness.


1024 daily data sets select the optimal frequency

No release of toxins

Uses low-power ultrasound that doesn't break the cell

Safe for aquatic life

Researchers confirmed it safe for fish and plants

Large water bodies

Treat large water bodies with any level of depth

Restoring the aquatic ecosystem

Algae are a vital part of the water ecosystem. This is why LG Sonic ultrasound technology reduces algae growth up to 90%. The sound waves prevent an algal species to form a bloom. Making it a long-term solution for a healthy ecosystem.

Aquatic ecosystem

How LG Sonic ultrasound works

Ultrasound is a proven ecological solution for algae growth. LG Sonic has perfected the effectiveness by integrating real-time data. Allowing to target specific algal species.

The ultrasound creates a sound barrier

1. Create a sound barrier

LG Sonic ultrasound creates a sound barrier in the top layer of the water which affects the buoyancy of the algae.

This fixes the algae in the water column and prevents to absorb sunlight for photosynthesis.

Lack of sunlight and nutrients

2. Lack of light and nutrients

Due to a lack of sunlight and nutrients, the algae cells sink to the deeper and darker layers of the water column. Here they are not able to photosynthesise.

Therefore, algae are no longer capable of growing further.

Controlled algae growth

3. Control algae growth

The algae will die while the cell wall remains intact, preventing the release of toxins from the algae into the water.

The algae will sink to the bottom of the water reservoir and are degraded by the bacteria present.

Data-driven water treatment

Ultrasound is only effective through the choice of adequate frequencies. Our experience of over 10 years has resulted in a database of optimal frequencies. Allowing us to control different types of algae effective.

Our database stores and analyses all data from our MPC-Buoy systems from all over the world. We’ve integrated it in our MPC-View water quality monitoring software.

Water quality data

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Proven safe for fish and plants

Various universities (i.a. University of Portsmouth, UK; UNICT Catania, Italy; and BOKU, Austria) investigated effects of LG Sonic ultrasonic algae control technology on the aquatic life. The devices have been proven to be safe for fish, plants, and zooplankton.

Long-term success

First effects of treatment are visible within two to three weeks. LG Sonic ultrasound decreases algae levels year-over-year. If algae growth is not treated, they will continue to grow faster. Making the problem worse each year.

After one year of treatment the improved water clarity shows its impact on the ecosystem. Resulting in plant growth, increased oxygen and fish growth.

Ultrasonic treatment process

MPC-Buoy algal bloom solution

LG Sonic developed the MPC-Buoy specifically for large water surfaces such as lakes and reservoirs.



Below you can find answers to frequently asked questions. If you cannot find the answer to your question, please feel free to get in touch with us.

  • What happens when the algae die?

    The ultrasound affects the buoyancy regulation of algae, fixing them in the water column. Due to a lack of sunlight and nutrients, the algae will sink to the bottom of the reservoir where they die, and eventually decompose.

  • Does the ultrasound cause a release of toxins?

    Algae control by ultrasound is based on interference with their buoyancy, in turn preventing their photosynthetic activity. Ultrasound does not break or lyse the cells, as such, toxins are not released into the water.


    As the ultrasound process is generally a two-to-three-week process in which growth of new algae is being prevented, you will see a gradual reduction in toxin concentration once the ultrasound has been introduced.


    The ultrasonic treatment will result in a lower release of toxins compared to no treatment or to the use of chemicals.

  • Which algae types can be controlled with ultrasound?

    The ultrasound can control common types of green and blue-green algae such as spirogyra, microcystis, and anabaena.

  • How long does it take before the algae die?

    There are different types of algae in existence which react in various ways to the ultrasonic treatment. On average, it takes two to three weeks for the treatment to take effect.

  • What is the effect of the ultrasound on aquatic life?

    The effects of our ultrasonic algae control products have been tested by various universities (The University of Portsmouth, UK; UNICT Catania, Italy; and BOKU, Austria) and are proven to be safe for fish, plants, zooplankton, and insects.

  • How long will it take to see the results?

    Commonly, you will see the effects of the treatment within two to three weeks

  • How will it help if the cause of the algae blooms is nutrients excess?

    Studies show that control of external nutrient sources often does not decrease the nutrient loads and algal blooms in water bodies. Lakes seem to respond very slowly to nutrient control interventions.


    This is because the nutrients remain in deposits for long term. They replenish algal blooms and trigger further eutrophication. A more efficient restoration method is to control algal growth, which helps prevent further accumulation of nutrients in the deposits. Reducing the nutrient is also necessary but, in many cases, very difficult to achieve that adequately even in a long term.


    Most of the nutrient management methods are not cost-effective and require repetition with unknown side-effects for an ecosystem. Besides, the duration and intensity of algal blooms is strongly depended not only on nutrients but also on a combination of environmental factors such as climate change and unbalanced ecosystem.