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photo of a lake, mountains, and forest

Bleu marine
The combination of aesthetics and biological regulation

Bleu marine is a dual-action biological dye designed to improve the visual appearance of water bodies while durably limiting the development of algae and aquatic plants.

By filtering out the light rays necessary for photosynthesis, it acts as a natural UV filterwithout the use of toxic substances.
The result: instantly azure-bluewater that looks more uniform, and a gradual reduction in plant overgrowth.

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Bleu marine

The 5 Key Benefits
of Bleu marine

  • Natural UV Filtration
    The water's color blocks the wavelengths essential for photosynthesis, limiting the growth of algae and aquatic plants.
  • Broad spectrum of action
    Effective against filamentous algae, microalgae, cyanobacteria, and many submerged plants.
  • Immediate visual improvement
    Restores a uniform azure blue hue and visually masks turbidity, improving the appearance of the water immediately upon application.
  • A biological and non-toxic solution
    This product is safe for fish, swimmers, and the aquatic environment.
  • Convenient and safe formats
    Available in water-soluble sachets (no direct contact) or as a concentrated liquid for large volumes.

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Lake Careze
Bleu marine
A brief overview highlighting the product's key features

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Packaging

Liquid version (concentrate)
Sachet version
  • 1 L canister
  • 5 L canister
  • 20 L canister
  • 1 kg box (100 g water-soluble sachets)
  • 5 kg carton (100 g water-soluble sachets)

Mechanism of action: a physical, non-chemical mechanism

Bleu Marine not a herbicide.

It does not kill plants through chemical action, but by depriving them of light.
By tinting the water, the product filters out the specific wavelengths required for photosynthesis.

Since the plants can no longer develop properly, their growth is gradually and naturally stunted.

Action focused on the substance

The UV filter primarily affects plants that begin growing underground before they emerge above ground.

Field of use

  • Hillside retention
  • Fire retention
  • Irrigation basin
  • Industrial basin
  • Fishing pond
  • Fish farming
  • Pleasure basin
  • Leisure basin
  • Swimming lake

Target species

  • Aquatic plants:
    Eurasian water milfoil, heterophyll, hornwort, Canadian waterweed,
  • Algae:
    Filamentous algae, microalgae, cyanobacteria.

Dosage and frequency of application

For effective UV filtration and stable coloration, the treatment must be renewed every 4 to 6 weeks during the growth period.

Water-soluble sachets
Liquid version

Directions: Place the packet directly into the water without opening it.

Target
Ratio per 1,000 m²
Frequency
Algae
1 bag (100 g)
3 to 6 applications
Plants
2 bags (200 g)
4 to 6 applications

Directions: Dilute or pour into the wake of a rowboat or motorboat.

Target
Ratio per 1,000 m²
Example of a treated surface
Algae
150 ml
~ 6,500 sq. ft.
Plants
300 ml
~ 3,300 sq. ft.

When should treatment begin?

Starting in early spring (March/April) and continuing through fall (October), depending on plant growth.

Expert advice and safety

Although Bleu Marine organic and non-toxic when diluted:

  • Handling: the pure product is strongly coloring. Wear gloves and protective clothing, especially for the liquid version.
  • Storage: keep between 4 °C and 38 °C, protected from freezing.

Need an accurate dosage calculation?

Using too little product will render the UV filter ineffective.
If you are unsure about the surface area or depth of your pool, a TASO technician can assist you.

Contact TASO Technical Support

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