Fresh-water anti-cyanobacteria kit 250 ml
  • Fresh-water anti-cyanobacteria kit 250 ml
  • Fresh-water anti-cyanobacteria kit 500 ml

Fresh-water anti-cyanobacteria kit


Anti-cyanobacteria treatment for a fresh-water aquarium.

Eliminates algae in your aquarium, and works effectively to fight against cyanobacteria.

This product is 100% effective against cyanobacteria, red algae and green algae.

Based on 21 reviews

Show reviews


Cyanobacteria – act quickly!

Cyanobacteria are a real hazard in freshwater aquarium keeping. Green in colour with blue tinges, they adhere to the substrate, algae and plants in an aquarium, and release cyanotoxins. Cyanobacteria proliferate very quickly, and eventually start to kill your aquarium’s occupants. This often results in a crash, especially if the owner is away for any length of time.

Consequently, once they first appear in your aquarium, we recommend you act quickly, and apply the daphbio® anti-cyanobacteria freshwater treatment which should bring the infestation to an end.

Effects of the daphbio® anti-cyanobacteria kit  

The cyanobacteria will start to show signs of weakness from day four of the treatment. They shrink in volume and number as they start to die off. We recommend that you siphon the cyanobacteria and residue from your aquarium at this stage.

In the majority of cases, treatment needs to run for 5 or 6 days to completely eliminate the cyanobacteria, but if need be, you can continue the treatment for a further 5 days.

Once the treatment has ended, daily use of Bactofresh will ensure your aquarium is once again magnificent.


Our anti-cyanobacteria kit, available in 250-ml or 500-ml sizes, comprises one bottle of Bactofresh and one bottle of anti-cyanobacteria bacteria, to effectively combat cyanobacteria.

Anti-cyanobacteria kit: choosing the right size 

  •  For an aquarium of 50 to 300 litres, use the 250-ml size anti-cyanobacteria kit.
  • For an aquarium of 300 to 600 litres, use the 500-ml size anti-cyanobacteria kit.

Instructions for use and recommendations

Do not swallow.

 Recommended dosage:


Upon receipt of the product, use 2 ml of Bactofresh per 100 litres of tank volume, preferably in the morning, every day for one month, then every other day.

Anti-cyanobacteria product:

  • For aquariums of 50 to 100 litres, pour in 30 ml of anti-cyanobacteria for 6 days.
  • For aquariums of 100 to 200 litres, pour in 40 ml of anti-cyanobacteria for 6 days.
  • For aquariums of 200 to 300 litres, pour in 50 ml of anti-cyanobacteria for 6 days.
  • For aquariums of 300 to 500 litres, pour in 60 ml of anti-cyanobacteria for 6 days.

Carry out the treatment every evening for 5 or 6 days, with the skimmer switched off for an hour.

Experts recommend siphoning out your cyanobacteria before treatment starts, and again four days into the treatment. They can indeed release cyanotoxins that are deadly for its other occupants.

 during the anti-cyanobacteria treatment and for 10 days afterwards.


Keep products in the refrigerator upon delivery, except for Bactofresh which is stored at room temperature.

Customer reviews

Reviews about this product

Based on 21 reviews

  • 5

    The product works well! I waited 4 to 5 days to feel the first effects. (Translated review)

  • 5

    Effective product. Also vacuum up cyanos as soon as they appear. (Translated review)

  • 5

    Very good product and very effective. (Translated review)

  • 4

    Effectiveness : medium (Translated review)

  • 5

    Top (Translated review)

  • 5

    Impressive efficiency! (Translated review)

  • 5

    Product conforms to expectations. Cyanobacteria were eliminated after 10 days of treatment. To be recommended. (Translated review)

  • 4

    To be seen in the long term if the price is justified (Translated review)

  • 4

    Much more expensive than the other products but also more effective for the moment the cyanos have completely disappeared. To be seen over time (Translated review)

  • 5

    Despite forgetting to stop the CO2 diffusion the product did 90% of the job. (Translated review)