Algae Control + Pond Pleaning Products

Chemical-free algae agent for combating algae in garden ponds, ponds, natural pools, natural and swimming ponds, water basins, lakes and other water areas.

High-precision click tones fight algae in a natural way. Infested waters with green algae, thread algae, blue-green algae become permanently algae-free within weeks.

G-Sonic 5

G-Sonic-5 für Biotopes
G-Sonic-5 for biotopes, ponds, aquariums

G-Sonic 5 for biotopes & aquariums, range up to 5 meters. Power consumption 12 Watt. Product details...

G-Sonic 10

G-Sonic 10 for garden ponds up to 10m length

G-Sonic 10 for garden and small fish ponds or small pools Range up to 10 m. Power consumption effective 15 Watt. Product Details...

G-Sonic 10 S

G-Sonic 10 S for natural swimming ponds up to 10m length
G-Sonic 10 S for natural swimming ponds up to 10m length

G-Sonic 10 for swimming ponds up to 10 m with 12v to click generator. Effective power consumption 15 watts. Product details…

G-Sonic 20 S

  G-Sonic 20 S for swimming ponds, natural ponds up to 20m length
G-Sonic 20 S for swimming ponds, natural ponds up to 20m length

G-Sonic 20 S for swimming pools, medium-sized swimming and garden ponds Range up to 20 m. Effective power consumption 22 watts. Product details…

G-Sonic 50 S

G-Sonic-50 S for large ponds, swimming ponds up to 50m length
G-Sonic-50 S for large ponds, swimming ponds up to 50m length

G-Sonic 50 for large swimming ponds, ponds, fishponds, Water tanksetc. Range from 25m to max. 150m. Power consumption max. 40 Watt. Product details…

G-Sonic 100

G-Sonic 100 for large waters, lakes, basins.
G-Sonic 100 for large waters, lakes, basins.

G-Sonic 100 for lakes, big ponds, water basins, water reservoirs, cooling basins, etc. Range from 100m to max. 200m. Power consumption max. 75 Watt. Product details…

Y-Sonic Antifouling

The Y-Sonic Antifouling Algae Exterminator prevents the adhesion of algae, shells to the hull of sailboats, yachts, motorboats and seachests. Up to the waterline the underwater protection remains.

Y-Sonic 10

Y-Sonic 10 Ultrasonic Antifouling for boats till 10m LWL
Y-Sonic 10 Ultrasonic Antifouling for boats till 10m LWL

Antifouling without chemicals, prevents algae, mussels on ship hulls range hull length LWL of up to 10m. Power consumption 15 watts. Product details…

Y-Sonic 20

Y-Sonic 20 Ultrasonic Antifouling für Ships up to 20m LWL
Y-Sonic 20 Ultrasonic Antifouling für Ships up to 20m LWL

Antifouling chemical-free, prevents algae, shells on ship hulls range hull length LWL of up to 20m. Power consumption 30 watts. Product details…

Pond Cleaning Products

For clear water the pond must also be cleaned! Dead algae or parts of plants must be regularly removed from the pond bottom, the shallow zone, otherwise an unsightly layer of mud will form. Here you can find out what products are needed for pond cleaning.

Pond Vacuum Cleaner – 8m3/hour suction power

Algae-free Pond cleaner 8m3/hour cleaning power
Algae-free Pond cleaner 8m3/hour cleaning power

The algae-free pond sludge vacuum cleaner, pond vacuum cleaner for pond cleaning. Professional vacuum cleaner for every application in the pond. 8000 l/h suction capacity, 10 m suction hose Ø38 mm. Product details…

Suction Bell for Gravel, Sediment, Mud, Leaves, Debris

Suction bell pond cleaning, tranparent XL
Suction bell pond cleaning, tranparent XL

Suction bell suitable for pond sludge vacuum cleaner, pond vacuum cleaners for pond cleaning. For sediment extraction from stones and loose subsoil. Diameter 160mm. Product details…

Pond & Pool Vacuum Head

Aluminum Pond floor cleaner
Aluminum Pond floor cleaner

Floor cleaner suitable for pond sludge vacuum cleaner, pond vacuum cleaners for pond cleaning. 35 cm wide, mobile. Suction connection for hose diameter 38 mm. Product details…

Triangle Pool Brush

Triangle brush vacuum head
Triangle brush vacuum head

Triangular floor suction brush suitable for pond sludge vacuum cleaner, pond vacuum cleaners for pond cleaning with brush strips for foil cleaning in the wall, corners and floor area. Product details…


Water Tank Pre-Separator

Pre-separator with connecting hose Ø38mm / 1 x C-coupling and filter mat
Algenfrei Pre Separator 8m3

The algae-free water pre-separator suitable for the pond sludge vacuum cleaner, pond vacuum cleaners for pond cleaning separates stones, heavy leaves, newts and frogs. Product details...


Mesh Fine Filter Sieve 300 Micron

Algae-free Fine filter Sieve elements 60, 120, 250 microns
Mesh Fine Filter Sieve 300 microns

The algae, sediment fine filter matching the pond sludge vacuum cleaner, pond vacuum cleaners for pond cleaning. Mechanical filtration up to 300 microns. C-coupling connection. Product details…

Sludge Bag

Water Filter Mesh Bag 100 micron
Sludge bag to filter water back

The sludge bag filters up to 100 micron particles for returning water to the pond. The synthetic fibre filter fabric filters particles as small as 100 microns out of the pond water Product Details

Microfibre Pool Wall Cleaner Set

Edlrein Microfibre basin wall cleaner
Edlrein Microfibre basin wall cleaner

Pool wall cleaner set with microfibre cloth, glove, telescopic pole for swimming ponds, pools, natural pools, ponds with foil. Product details...


JBL Professional Water Test Case

JBL Testlab, water test case with tests for freshwater analysis
JBL Testlab, water test case with tests for freshwater analysis

JBL Testlab, test case with tests for freshwater analysis with 9 different tests for comprehensive water analysis: 2 x pH 3.0-10, pH 6.0-7.6, CO2 table, etc. Product details…


Water test strip 6in1 (50)

Water Test Strips, measures:  Chlorine, pH value (PH), Carbon hardness (KH), Total hardness, Nitrite (NO2), Nitrate (NO3)
Water Test Strips, measures: Chlorine, pH value (PH), Carbon hardness (KH), Total hardness, Nitrite (NO2), Nitrate (NO3)

50 water test strips to determine the water quality in 1 minute. All 6 important water values are checked in only one step: Total Hardness (GH), Carbon Hardness (KH), Total Hardness (GH), Nitrite (NO2), Nitrate (NO3), Chlorine (CI) Product Details...

PO4 Phosphate Sensitive Test Set

PO4 Phosphate Sensitive Test Set
PO4 Phosphate Sensitive Test Set

Exact test to measure Phosphate PO4 as low as: 0.05 / 0.1 / 0.2 / 0.4 / 0.6 / 0.8 / 1.2 / 1.8 mg/l in fresh water or salt water. Product details…

PO4 Phosphate Binder – 2.5 Litres

 PO4 Phosphate binder
PO4 Phosphate binder

The PO4 phosphate binder actively combines with the nutrients contained in the water and ensures clear water. Product details…

Delivery Worldwide

Order online and we’ll ship your order to over 150 countries worldwide. You will find an overview of the prices and shipping time in the shopping cart.

G-Sonic 50 S

The natural G-Sonic 50 S algae control device is specially designed for large swimming ponds, natural pools, swimming biotopes, small lakes, fish ponds and water reservoirs due to its effective click sound range of up to max. 50 metres. Only 24 Volt signals are sent to the click generator, in compliance with the swimming pond standard VDE 702-100.

G-Sonic-50 S für large ponds
G-Sonic-50 S for large ponds
Click Generator Mounting
Click generator mounting clamp

The G-Sonic 50 S algae killer is absolutely maintenance-free and effectively prevents algae growth, thus ensuring clear water. Already existing floating algae die within a few days, green algae within 3 to 4 weeks, thread algae after approx. 7 weeks.

The G-Sonic 50 S algae remover also causes the biofilm (algae mucus layer) on the walls to be broken down by up to 2/3 and thus effectively prevents pathogens (pathogens) from multiplying.

When swimming, at most an interval-like clicking sound can be heard, as the human ear can hear through the skin.

With a short-time timer you can simply turn it off while swimming. Due to the very low energy consumption of max. 40 watts, operation with battery-buffered solar collectors is possible.

Technical Specifications

  • Compliance with the swimming pond standard VDE 702-100 (24 Volt signals to the click generator)
  • Power consumption 40 Watt
  • Voltage electronic control 24VDC / 88-264VAC, 47-63Hz (1m cable with connector)
  • Click generator Signal cable length 15m
  • Click generator mounting
  • Electronics box Dimensions LxWxH 130x130x60mm
  • Click generator dimensions Lxdiameter 150x63mm
  • Sound range 50 metres, lateral 25 metres each
  • Weight 3.5kg
  • Life span up to 10 years
  • EU quality product with 2 years warranty

Warranty & Guarantee

Conditions for all warranty claims are listed in the General Terms and Conditions, as well as the proper and professional installation of the devices according to the installation instructions delivered with your device.

  • 2 years warranty and guarantee

Delivery Worldwide

Order online and we will deliver your G-Sonic worldwide in more than 150 countries to you. Find an overview of prices and shipping time you in the shopping cart.

Natural Algae Control & Removal

Keep garden, koi, natural, swimming ponds free of algae by effective click sounds & without chemicals.

Algae polluted biotopes and ponds are unpleasant and annoying for owners and users. In many cases, pond and garden owners resort to chemicals to curb algae growth. However, if gardeners want to be more environmentally friendly, then there are alternatives.

Kill algae naturally and remove algae easily, effectively & environmentally friendly by the G-Sonic Algaefree controller.

Natural & ecological algae control 

The Algae killer takes place with high-precision clicking tones, without chemicals or power consuming technologies, e.g. UVC lamps, ozon.

Acoustic signals are sent underwater, causing the hollow bodies of the algae cell to enter and tear into a resonant vibration. The algae dies completely naturally and ecologically within a few weeks. The algae release device fights the algae in the garden pond and provides long-lasting protection against new algae growth.

The algae-free package, carefree and easy use for pond & pools care with clear water results

Algae-free package: G-Sonic + pond mud sucker + filtered water repatriation
Algae-free package: G-Sonic + pond mud sucker + filtered water repatriation

The pond should definitely be cleaned several times a year to remove the bundled nutrients, i.e. impurities such as dead algae, leaves and mud, from the water. This is possible, for example, by a professional pond sludge sucker.

The pond cleaning also includes filtered water repatriation with a fine filter. Thus, the pond is cleaned and purified in every way.  Detailed information about the algae-free package can be found here:

The intelligent click technology is very simple

The G-Sonic device emits high-precision acoustic click signals in several frequencies which are not audible to humans or pond dwellers. The frequencies of the click-tones are precisely tuned to the diameter of the algae vacuoles bringing them into a self-resonance vibration. As a result, the vacuoles tear apart, leading to the death of the algae due to stress. Existing algae die within 2-3 weeks, floating algae within 1 week, making the water clearer. It can take 6 to 8 weeks for tough thread algae till the cell wall to rips. More about the functioning >.

G-Sonic product overview

G-Sonic-5 for biotopes
G-Sonic-5 for small ponds, biotopes
G-Sonic 10 S for swimming ponds, natural pools
G-Sonic 10 S for swimming ponds up to 10m

Other products are available in the online shop with price lists, technical details and data sheets.

Application areas start from small biotopes to large lakes

The algae control removers prevent algae growth, making the water clearer and significantly reducing the maintenance effort. The areas of application therefore are very diverse:

Algenfreies Aquarium mit Fischen
Aquarium with Fish
Natural Swimming Pool, Pond
Fish-& Koi Pond
Badesee & Naturbäder
Swimming lake, large pond, reservoires

The main advantages

  • Enormous effectiveness with high-precision clicks against all algae species
  • Existing and new algae die off within weeks
  • Very environmentally friendly: Algae products, chemicals, biomass are omitted
  • Low power consumption, from 8 watts / h
  • The devices are maintenance-free
  • Long lifespan of up to 10 years
  • Ecologically and economically rewarding investment

High-precision clicks as natural algae treatment

Algae free by effective ultrasonic clicks
Algae free water by high-precision ultrasonic click tones, 100% natural and environment friendly

ClickSonic’s ultrasound click technology reduces algae by up to 90% and prevents the growth of new algae, so well existing algae. Being very environmentally friendly for a healthy ecosystem and long term solution. Ultrasound (high frequency inaudible waves of 20KHz) are also produced in nature for example with the fall of water, whether rain or a waterfall on to a hard surface. These accoustical ultrasonic waves can then be used without prejudice for the eradication of algae. Under normal conditions the algae formation is reduced up to 90%, saving maintenance costs considerably.

Free pond advice and analysis

Algae free offers free advice and analysis to determine the optimal postionation and use of G-Sonic devices. Contact us here.

Current topics:

How can I fight thread algae?

Fight thread algae, eliminate, remove, destroy, stop, ade & co. How to successfully fight and destroy thread algae in the biotope, pond, koite pond, swimming pond, garden pond, biotope can be found here at more string, thread algae control methods.

Clear water without chemicals and algae agents

The effectiveness of the ecological process has been confirmed in many studies, the independent Swiss biologist and water specialist Dr. Peter Bossard emphasizes: “Click tones can be used to combat algae growth in ponds with little effort and limit it. Without having to use environmentally hazardous or even toxic algae products or chemicals. ” In addition, the method can be used almost anywhere. It is only necessary to find the optimal position of the click generator in the water. The device emits acoustic waves in the area via human hearing, which gradually reduces algae growth. “The algae usually die within two to three weeks, but the water becomes much clearer after just a few days,” says Martin Studer, managing director of manufacturer ClickSonic. The company manufactures devices with ranges of five to 150 meters and also advises where to place in the water. Floating algae, flowering algae, green algae, green algae, filamentous algae and bluegreen algae, cyanobacteria can become a major problem. Environmentally conscious and without large technology and expensive algae remedies, the algae problem can of course be tackled without the addition of chemical agents.

The G-Sonic devices sets new standards

Algae free is particularly pleased to announce the new generation of devices “G-Sonic” with numerous new performance features. Read more: The G-Sonic devices set new standards.