Legend Vivendi Alus


Legend Vivendi Alus™ opticlear water treatment contains specific elements to bind 95% of the pollutant particles in the aquarium within 1- 2 hours. It is an effective treatment against cloudy water and will help to provide crystal-clear aquarium water.

Adding Legend Vivendi Alus™ to the water, you will see a cloudy haze begin to form. This is normal and means that Legend Vivendi Alus™ is beginning to work. The water is filled with tiny pieces of floating matter that are not visible to the naked eye. Legend Vivendi Alus™ makes those pieces of matter begin to clump together. As they clump together they form larger pieces of matter that are now visible, hence the cloudiness. Once this matter has clumped together, it is a simple matter of mechanical filtration to remove the residue. Matter that was once too small to get caught in filter media is now in large enough clumps.

This product also helps fish to create a protective mucous membrane which can help to prevent possible disease. 

Suitable for use in freshwater and marine aquariums alike.


Sizes: 100 mL, 250 mL, 500 mL, 1 L, 5 L


Legend Vivendi Alus contains both precipitating and flocculating agents in the same bottle, enabling all types of cloudiness to be removed in one dose.



Shake well before using.

Use 5 mL for every 80 L (20 US gallons). In some situations the cloudiness may increase after adding Vivendi Alus™ however this is normal and is a sign that Vivendi Alus™is actively working. Rapid clarification will follow (1–2 hours). In the case of chemical or particulate clouding clean filter floss or cartridge after tank clears.


Use the product only in freshwater aquariums and dose it only during the lighting period

Dose slowly over 20-30 seconds, away from livestock or plants, where the water currents are the highest

Dose only if the KH of the water is at least 2 degrees and do not dose more than twice per week

Allow 24 hours for a maximum degree of clarification

To prevent particles in suspension, clean the filter and vacuum the substrate more often

Do not contaminate the solution with aquarium water

Do not ingest and keep out of reach of children and pets

Store at room temperature. Protect from light, heat and frost

For aquarium use only


Legend Vivendi Alus MSDS 20230622.pdf


Shrimp friendly

Storage: at room temperature. Protect from frost and heat. Keep out of reach of children and pets.

Use: Only for fertilizing ornamental plants in an aquarium.

See package insert for detailed dosage recommendations. Note: official guidance recommendations take precedence.

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Water clarifier for marine and freshwater

Clears all types of clouding

Reef and plant safe

Rapidly polishes water for a crystal-clear aquarium

Naturally safe