Algae and Algae Species

There are thousands of algae species. In the classical classification of algae, the Chloromonadophyta, yellow-green algae, gold algae, diatoms and the brown algae are counted as classes to the group Heterokontophyta.

Green algae

Green algae types such as Chlorophyta, Chlamydomonas, Spirogyra, Cladophora, Hydrodictyon, Volvox, Spirogyra – spiral algae, Plantosphaeria, Sphaerocystis. The green algae also include the filamentous algae, which form green algae wadding. They often appear gelatinous.

Through the gas in the bubbles, the green algae drift to the surface and form a foamy carpet.

Blue-green algae

Blue algae (cyanobacteria) are not algae, strictly speaking, but bacteria, which at first glance have a similar appearance to algae and are commonly counted among them. With strong eutrophication, ie too high nutrient content, massive surface blooms or algal blooms form.

Blue algae in the lake form an oily film on the water surface.
Blue algae in the lake form an oily film on the water surface.

Brown algae

Brown algae (Phaeophyceae) look brownish and have a form of branched filaments in the garden pond. Brown algae are often found on plants and stones in fresh water

Brown algae like to accumulate on stones in shallow places from the pond.
Brown algae like to accumulate on stones in shallow places from the pond.

Brown algae in the saltwater look completely different, with large leaves and form up to 100m long threads, with which they root themselves in the soil. Brown algae in the sea can be found in cooler regions.


Diatoms (Bacillariophyta) are brown colored and called by a hard mineral shell, a cell envelope also Frustel. The brown alga consists mostly of silicon dioxide, as well as the brown alga. Silicon dioxide (SiO2) has the property of being very hard and is resistant to chemical agents.

Diatoms (250X) are a type of micro-algae. Over 100K different species exist. Foto: Kevin Dooley
Diatoms (250X) are a type of micro-algae. Over 100K different species exist. Foto: Kevin Dooley

More information about various types of algae:

Spirogyra algae cell under the microscope

These photos were taken with normal optical microscopy techniques under 400 magnification and show the effect of clicks on the algae cells:

The algae release creates acoustic clicks and emits click sounds under water. The hollow bodies, vacuole of the alga get into a squeeze through the high-precision clicks and tear. The cell juice comes out and the alga dies naturally.

Other species of algae under the microscope

Image source & friendly permission by NERC CEH

Additional Information

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 ultrasonic algae control 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 ultrasonic algae control 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.