UV water purification against algae in ponds has no effect

Many of our customers (e.g. with koi fish) combine the UVC pond lamps with algae-free devices, since the UVC lamp alone does not guarantee clear water and often only has an insufficient effect against thread algae.

UV Lamp in housing

In a freshly filled pond there are automatically plenty of nutrients at the beginning. Since the algae do not yet have enough competition in the fight for fertilizer from newly planted plants, they multiply explosively. A UVC lamp can destroy floating algae, but not filamentous algae.

If the dead and decomposing algae are not removed from the pond, they decompose within minutes and the nutrients bound in them remain in the pond, where they serve as food for the next generation of algae. There is competition within the algae, namely between floating and filamentous algae. When the floating algae are no longer present, the filamentous algae multiply at the expense of the floating algae. The particularly stubborn thread algae can be killed with the help of the G-Sonic algae-free device , which also combats green and floating algae.

With an UV lamp ultraviolet light is used to destroy and eliminate microorganisms such as bacteria, viruses, fungi and microorganisms in ponds. The pond water passes the UV light where UVA and UVB rays destroy the important micro life inhabitants in pond and pool waters.

Application Areas

The fields of application are manifold: Everywhere with standing water for aquariums, biotopes, ponds, natural pools, swimming ponds, garden ponds, fish ponds, greenhouses, ships, etc. Also in the industry the algae freeing devices provide clear water, biofilm and algae formation for a chemical free, natural and environmentally friendly solution.

Aquarium, fish tank
Biotopes, garden ponds
Natural pools, natural ponds
Swimming ponds, swimming pools
Swimming ponds, swimming pools
Motor ships – & sailboats, yachts
Cooling basin industry

The algae eliminators are absolutely maintenance-free and prevent algae growth with effective click tones. The click tones prevent the formation of algae, which makes the water clearer and considerably reduces the amount of maintenance required.

G-Sonic 5 for biotopes, small ponds, large aquariums up to 5m length

The sound range of the smallest model G-Sonic 5 is a maximum of 5m and is particularly suitable for biotopes, small ponds, garden ponds and open large aquariums.

Malawi Aquarium with G-Sonic 5 against beard algae
Malawi Aquarium with G-Sonic 5 against beard algae

The sound range of the G-Sonic 10 is maximum 10m and is especially suitable for larger biotopes, ponds, garden ponds, as well as for small swimming ponds with the G-Sonic 10 S.

Garden pond with G-Sonic 10 against green and floating algae

G-Sonic 20 S for swimming ponds, natural pools, large garden ponds

The sound range of the G-Sonic 20 S is a maximum of 20m and is particularly suitable for large ponds and swimming ponds.

Swimming pond, natural pool with G-Sonic 20 S against green algae
Swimming pond, natural pool with G-Sonic 20 S against green algae

G-Sonic 50 S for swimming ponds, small lakes from 25m to 50m

The sound range of the G-Sonic 50 S is 50m in turbid water and is particularly suitable for large ponds and swimming ponds with a length between 25m and 75m, depending on water quality.

Swimming pond with the G-Sonic 50 S for clear water

Y-Sonic Antifouling for Ships, Motorboats and Sailing Ships

Underwater algae free with the with Y-Sonic 10, Y-Sonic 20: Algae and mussels are a big problem for every boat owner and damage the ship’s hull.

Y-Sonic Antifouling for a clean ship hull

G-Sonic 100 in industry and environmental technology

The Clicktechnik is a very environmentally friendly process method for more and more applications and processes in industry. Especially where water is used in large areas to lower the temperature and avoid residues or side effects of chemicals. The G-Sonic 100 has already been used successfully in environmental technology on several occasions.

Industrial cooling basin with G-Sonic 100

Also in small cooling basins with the G-Sonic 10 where pure water is used without the addition of chemicals to stop algae formation and biofilm.

Cooling water basin for ceramic casting, e.g. illuminant Manufacturer

G-Sonic 10 – 100 for water basins in plant breeding, nurseries and garden centres

Algae have a negative effect on the water quality and contaminate or clog filters. The biofilm, a slimy deposit which serves bacteria and germs as culture medium, is degraded by the algae eliminator G-Sonic 10, G-Sonic 20, G-Sonic 50, G-Sonic 100.

Rainwater retention basin in a nursery with two G-Sonic 10 for a 360° click tone distribution
Rainwater retention basin in a nursery with two G-Sonic 10 for a 360° click tone distribution

Further Application fields

Everywhere in the water where algae are produced, with standing water, the intelligent click technology can be used.

Lifetime of Algae-free devices

G-Sonic-50 S für large ponds
Click generator made of stainless steel

The electronic control unit shows almost no signs of wear. To prevent possible damage due to moisture, the electronics should always be installed or stored in a dry place.

The algae eliminator has a life span of 10 years based on experience. The algae eliminators are designed with high quality components to withstand more than normal loads.

The following measures must be taken to ensure a long service life:

  • The G-Sonic can be switched off in winter when it is very cold or on ice.
  • In winter there is a risk of ice and snow pressure, which can cause water to enter the electronics box.
  • The electronics box should be stored in a dry place.
  • In darkness there is hardly any algae cell division and the algae eliminator can be switched off, e.g. from 22:00 to 05:00.
Time Switch
Time Switch
  • In case of a slight algae infestation, you can additionally interrupt the power supply every half hour.
  • Permanent wetness and high temperatures (direct sunlight) should be avoided.

More information

Functionality of the click tones against algae

The G-Sonic algae control device generates acoustic click tones and sends these signals to the click generator. The click generator is the loudspeaker under water, which emits the click tones as a complex sound wave pattern under water.

High-precision acoustic click tones as a natural algae remover
High-precision acoustic click tones as a natural algae remover

The clicks act on the vacuole of the algae, a microscopically small bubble, a cavity in the middle of the algae cell that refracts the light. The vacuole resonates until the membrane filled with cell sap cracks.

Green algae – Chlorophyta, Chlamydomonas, Spirogyra, Cladophora, Hydrodictyon, Volvox

Effect of high-precision click tones on green algae: The click tones damage the vacuole, till they tear and the algae dies naturally.
  • Existing green algae usually die within 2-3 weeks, depending on the type of algae; in the case of thread algae, this process can take up to 6-8 weeks.

Blue-green algae – Cyanobacteria

Effect of high-precision click tones on blue-green algae, bacteria. The click tones damage the gas vacuole, till they tear and the algae dies naturally.
  • Existing blue-green algae usually die within 1-3 weeks, depending on the type of algae.

With the click tones, all native algae species, such as green algae, thread algae, slime algae, brown algae, brush algae, beard algae and blue-green algae die due to natural stress.

Due to the methane gas present in the thread algae, the dead algae rise to the water surface where they can be sheared off. The dead thread algae can now be easily removed and the result is quickly visible. In a rain shower, the methane gas reacts and the dead algae sink to the bottom of the pond. All other algae species decompose into tiny particles of 1-2 microns and sink to the bottom.

The permanent use also prevents the formation of new algae.

Studies and experiments have shown that neither flora nor fauna are affected by the algae eliminator. The click tones are completely harmless to humans and animals, including fish. The desired aquatic plants thrive much better and the water becomes clearer.

Click tones and biofilm

The biofilm, algae film, mucus layer, coating, growth, mouldy skin or sewage skin is a thin mucus layer that is often found at the edges and at the bottom of ponds. Many microorganisms (e.g. bacteria, algae, fungi, protozoa) are stored in the biofilm. Due to the nutrients present in the biofilm or mucous layer, algae can multiply very strongly.

With the help of click sounds the biofilm is reduced by 50-75% as the algae growing on the biofilm do not exist anymore.

At the same time, by reducing the slimy layer pathogens and other bacteria have a much lower chance of survival, which makes the G-Sonic device ideal for swimming ponds.

Click tones and environment

The algae eliminators are environmentally friendly and free of chemicals. The sounds emitted by the device are not audible to humans and do not harm animals, fish or plants. This was confirmed by different universities (among other things university Gent) after long and detailed experiments at ponds (applies also to swimming ponds) and aquariums. Click sounds are produced in nature by many animal species, such as bats, dolphins and whales. Under water, humans hear the click sounds depending on their hearing ability.

Click sound propagation

Click sound propagation
Click generator sound propagation

The click tones are emitted by the click generator over a radius of 180°. The range depends on the model of G-Sonic algae free device. Placed at a favourable location at the edge of the water, the units can radiate sound to a semicircle with a radius of up to 150 metres, depending on the type, thus treating a water surface of up to 300 metres around the unit.

Position of the click generator

The click generator is placed in a favourable position at the edge of the water body in order to sound as large an area of water as possible. If you have a second external pond, it must also be equipped with an algae eliminator. The circuit must be closed, otherwise fresh algae will be added externally and the water object will be constantly “infected” with new algae.

Click sound propagation under the water surface.
Left: optimal position / Right: schadow zones

Click tones and safety

Security is a major concern. All algae free devices have galvanic separations with additional fine fuses. Only one loudspeaker signal is sent to the click generator, with the G-Sonic swimming pond (S) models max. 24 Volt. All algae free devices are CE compliant.

G-Sonic Algae Terminators

The Algae-free Package for Guaranteed Clear Water

The pond should be kept several times. cleaned annually in order to remove the bundled nutrients, i.e. the Impurities such as dead algae, leaves and sludge, from from the water. This is made possible, for example, by a Professional pond sludge suction cleaner. The pond cleaning also includes the filtered water recirculation with a fine filter. So the pond cleaned in all respects.

1. Elimination of algae in an environmentally friendly way with the G-Sonic click system

Click for click is done with high-precision Tone in a gentle and environmentally friendly way the algae under the I’m under a lot of stress. Chemicals are therefore unnecessary. Through successive clicking tones of very high frequency the Vacuole, the core of the single-celled organism, set in permanent vibration and the algae dies. The G-Sonic suppresses algae formation all year round.

2.  The algae-free pond vacuum cleaner

The algae-free pond sludge vacuum cleaner with 8000 l/h extraction capacity is suitable for every application in the pond. suitable. The pond sludge vacuum cleaner for garden ponds offers a high suction power and can remove sediments from up to 2.5 m Deep suction. soil sediments are formed by dead plants and algae and settle at the bottom of the pond. These nutrients must regularly removed from the pond.

3.  Filtered water recirculation

In order to obtain sustainable clear water, the water should be filtered and recycled. The algae fine filter mesh bag, bow sieve filter or drum filter mechanically filters the water return. The extracted water is led through a filter back into the pond.

The following products are suitable depending on the size of the pond:

  • Biotopes and small ponds: Fine filter bag for water recirculation 100 micron
  • Ponds from 50m3: Fine mesh filter set 300 micron
  • Ponds from 100m3: Drum filter 50 micron with optional fine filtration 20 micron

The filtered water recirculation retains nutrient-rich particles and thus interrupts the algae vicious circle in the pond. With this algae free set you get the algae problem simply under control.

Clickton Technology in Industry

Cooling basin industry

Our practical experience with “Low Power Algae Cleaner with 8-22 Watt” in ponds shows that floating algae die within a few days (maximum 1 week), green algae within a few weeks (maximum 1 month). In addition, bacteria and Escherichia coli (E. coli) are reduced or eliminated.

High power ultrasonic devices over 1000 watts are used in the food industry, automation and environmental technology. The disintegration of organic cells takes place within seconds and kills all living beings immediately.

Water Cooling Towers

In industrial production it requires cooling water for a whole range of processes. The water for the cooling system is mainly used for tap water or well water and algae are automatically introduced into the cooling system.

Cooling towers usually show algae growth and the algae attack the concrete. Due to the dying process of the algae they shrink and damage the concrete surfaces, due to the intensive adhesion of the algae.

In cooling towers, vast amounts of biocides are often used to reduce or control the formation of algae. The costs for the chemicals together with the manual cleaning of the algae removal (mostly by hand with the high pressure cleaner) contribute to a not inconsiderable cost share.

water cooling towers - algae formation in the water basins
Water cooling towers – algae formation in the water basins
Click generator in the water basin against algae instead of chemicals
Click generator in the water basin against algae instead of chemicals


In biotechnology, click tones are used in the manipulation and separation of biological cells for the targeted disintegration of their contents. In the field of disinfection, for example, the click-tone method can be used as an environmentally friendly substitute for chlorinated solvents and disinfectants. With click tones, disinfection can be achieved by dissolving bacterial accumulations and reducing the bactericide level.

Water treatment

Another application in the field of environmental technology is the use of click tones in drinking water treatment, whereby the click tones support conventional processes such as UV irradiation and ozone treatment. Click tones are also used when it comes to keeping waters free of algae or other biological cultures. It is an extremely environmentally friendly process because it does not require any chemical additives.

Other applications

  • The algae concentration in industrial Reduce cooling circuits
  • Eliminate bacteria, pathogenic germs in open cooling basins
  • Biofilm to reduce algae film in cooling water basin, e.g. illuminant manufacturer
In ceramic housing production, the housings are cooled with pure water after die casting in the cooling basin. The G-Sonic 10 prevents the formation of algae and the biofilm in the water basin.

Algae-free controllers for industry

Pond Consulting and Analysis

Algae-free offers a free consultation and analysis to find the optimal position of the algae control device in the water object. The intelligent technology can be used for large aquariums, biotopes, ponds, natural pools, swimming ponds, bathing lakes, water reservoirs, yachts, boats, ships – wherever there is standing water.

The free consultation can be requested as soon as the criteria according to the G-Sonic checklist are fulfilled.

To enable our experts to make the optimum assessment for the water object, please send us the complete characteristic data using the form below.

Overview of the required characteristic data

  • Your country & postcode, so that we can store your data. Address and telephone number for queries.
  • Photographs (a complete photo and detailed photos of the problem zones) * Mass of the water object: length, width, depth (for objects with different depths, a cross-sectional sketch is required) *
  • Water values (mandatory for koi and fish ponds): phosphates (PO4), total hardness (GH), carbon hardness (KH), nitrite (NO2), nitrate (NO3-), pH value (PH). Water test sets: 6in1, phosphate test for multiple applications are available in the online water test shop.
  • Filter system and other technical equipment (particularly important for Koi and fish ponds)
  • Obstacles (stones, plants, etc.) / External ponds, biotopes, water inlets (from a stream or stone) must be visible
  • For groundwater or fresh water supply: the quantity in cubic litres per day

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