The algae picture:
because our future is green ist

Solaga is the first company in the world that has succeeded in developing biofilms from living microalgae and using them as air filter media.

Alwe Das Algenbild

Bad indoor climate is improved by algae

Alwe is the best answer to all these influences, because Alwe harnesses the survivability of living organisms to create clean air naturally.

Alwe is an eco-efficient wall decoration. The algae pattern brings life to the wall - space-saving and easy to clean. At the heart of Alwe is a living microalgae biofilm, which actively binds air pollutants and makes them harmless as an air purifier. 

Alwe is a living Image

Your algae picture is simply attached to the wall. At the back is a water tank that supplies the algae with moisture.

Through the frame can
Air enters

The algae inside the algae housing breathe through photosynthesis. This supports the air circulation through the algae.

Algae bind and decompose
air pollutants

At the surface between air and algae, air pollutants are bound and metabolized by the algae. The result is of course better air.

Fulvio Rosano (Kreisform) (1)

Fulvio Rosano

Alwe an der Wand

Biological air purifier

The algae wall decor "Alwe" is the world's first self-sufficient biological air purifier made of microalgae. It convinces not only with its air pollutant filtering, but also with its attractive appearance.

Alwe can be mounted on any wall, whether in the cozy living room or at work. Beautify your premises and improve the air in places where you spend most of your time.


Natural circulation

The filter system of the Alwes works by natural air circulation, which is caused by evaporation. The air flows into the frame through side openings and then escapes again at the frame head.

Only the watering of the algae must be done by the included filler bottle with distilled water and algae nutrient solution. - Treat your algae like a houseplant.



Alwe Bewässerung
Schlechte Luft Feinstaub

Healthy and fresh air

In contrast to plants and mosses, algae are convincing because of their much more efficient filtering performance. Algae do not need soil to survive, but are able to gain their nutrients from the air and the surrounding water. Substances such as fine dust, nitrogen oxides, CO₂ and other chemicals, which are hazardous to human health, serve as a nutrient medium for the algae. The filter performance of one picture is sufficient to clean a room of approx. 20-25m² below the harmful limit values.

Scope of delivery

With the help of the thoughtful packaging, your algae picture, will arrive at your home intact. Included is a water spray bottle to fill the water tank, 500ml of distilled water and a bottle with additional nutrient medium to increase the growth of algae.

Due to the optimized growth, the biofilm is able to perform the pollutant uptake even more efficiently. In addition, a short instruction is in the package, which clarifies the correct handling of their algae picture.

Alwe Verpackung

Natural life cycle

Like all living organisms in this world, algae are also subject to a natural life cycle. In the process, the color of the algae changes from an initially dark green to an increasingly lighter shade of green. This process is individual for each image and depends on external influences such as sunlight, temperature and the amount of water supplied. This process is normal, but over time leads to a reduction in the efficiency of the pollutant uptake.

Zur optimalen Filterleistung empfehlen wir daher, den Algen-Biofilm in 6-monatigen Zyklen auszutauschen.

Easy exchange

On request, we will send you a new natural biofilm, which you can easily insert into the frame by means of a sliding system to exchange it with the old biofilm. Detailed instructions and an explanatory video are included in the scope of delivery.

Alwe Algenbild

Algae in the picture - Biological air purifier

Everyone is familiar with the situation when, after some time of concentrated activity, it suddenly becomes apparent that the air quality of a room has decreased significantly.

It is obviously clear that this did not change abruptly, but continuously. To prevent this effect we have Alwe invented. We make the metabolic activity of the Algea which are stimulated more intensively with a greater load. fresh air to create. Alwe begins to breathe as soon as they do.

Oxygen concentrations below 19.5% not only lead to lack of concentration, headaches and discomfort, they are also dangerous for the body and its organs. Increased immune reactions and decreasing performance occur. The fact that the body is then unable to recover properly leads to a downward spiral of exhaustion. Furthermore, there are quite a few pathogens and pollutants in the air, which bring individual threats. So, our home is exposed to daily stresses that are not always visible to the naked eye. These include threats from particulate matter, volatile gases, bacteria.

Fulvio Rosano (Kreisform) (1)

Fulvio Rosano

Microalgae are unicellular microorganisms that belong to the class of phototrophic organisms, i.e. they carry out photosynthesis. This means that microalgae, just like plants, use light to bind carbon dioxide and release oxygen.

Alwe - The algae image uses specially selected microalgae, which are found in nature especially under stones. As a result, these organisms are adapted to be active even under very difficult light conditions - such as those we find in our interiors - and to carry out effective photosynthesis, among other things. For this purpose they have developed extraordinary photosystems, which are clearly different from those of plants.

Microalgae have a more flexible metabolism than plants, for example, and can therefore break down a large number of pollutants.

The current dimensions of Alwe50 are 50x50x5cm. The weight is 1.2 kg when empty and about 1.5 kg when filled.

In biologically correct terms, the algae are blue-green algae, i.e. cyanobacteria. These are adapted to low light and have special pigments that enable photosynthesis even at the lowest light levels. This makes microalgae biofilms more efficient than plants and also air improvers in places where plants die mercilessly. 

In investigations with the Federal Institute for Materials Research and Testing and the Technical University of Berlin, we have also discovered that microalgae biofilms can effectively bind air pollutants that are hazardous to health, such as nitrogen oxides and fine dust.

Initial tests at the Federal Institute for Materials Research and Testing also point to the reduction of volatile organic chemicals (VOCs) escaping from paints and building materials. Microalgae have a more flexible metabolism than plants, for example, and can therefore break down a large number of these pollutants.

Microalgae need light for their metabolism. Our algae picture is therefore best suited for rooms that are at least partially exposed to the sun.

However, please avoid attaching Alwe to surfaces that are often exposed to direct sunlight. If there is too much sunlight, more water will evaporate and the microalgae may start to break down their photo systems. The result is the fading of the biofilm. Should this happen, do not panic: Just leave Alwe in a shady place for some time and the biofilm will regenerate.

When designing Alwe, it was particularly important to us to keep the handling simple and manageable. That's why there is a small water tank in each Alwe, which needs to be refilled approximately every two weeks.

Yes, Alwe consists of living algae which adapt to the local light conditions. In shady areas the algae take on a deep green colour, as the micro-algae accumulate more pigments to absorb light more effectively. In semi-shade areas, the micro-algae need less pigments for successful photosynthesis and thus get a rather juicy and natural green colour.

In direct sunlight there is an overflow of energy in the algae. Under certain circumstances, this may cause the algae to actively break down their photo systems. The result is a colour change to light green or yellowish.

Algae films have not yet been researched in the long term, as these materials are completely new. However, we have not been able to identify any time limits in our previous R&D projects. Some of our algae films are already 4 years old and still healthy and productive, which is even more important. As algae films are living materials, no general statement can be made about their lifetime, as this obviously depends on care and local conditions. As far as we know, however, our biofilms are very robust, making them suitable even for users with brown rather than green thumbs.

With the purchase an Alwe we guarantee a minimum service life of 6 months. If problems occur within this period, you can return your Alwe without any problems and have it replaced by us.

Even after this period of 6 months you can of course always have your Alwe checked by us or you can try out one of our new biofilms. Please feel free to contact our service team.

In interiors, lighting in particular differs from natural light. Even with perceived bright interior lighting, the photosynthetically activating radiation is very low. This is because normal indoor lighting lacks the red and violet components of natural light that most plants need for photosynthesis. The microalgae biofilms we use, on the contrary, have special pigments that enable them to use light outside the red and violet spectrum for photosynthesis.

In addition, microalgae do not have roots or a stem and are therefore metabolically more effective compared to plants. 

Our carefully cultivated microalgae belong to the so-called safety level 1, which describes organisms that are unlikely to have a negative effect on health. This means that they are not dangerous to animals, humans, plants or water and can be used without restrictions. Organisms from the food industry such as cultures of yoghurt or baker's yeast also belong to this safety class.

Our biofilms are produced under sterile conditions. Only when the biofilms have formed their characteristic protective skin layer are they released by us for usage in the algae image "Alwe".