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 12 reviews

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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.

For larger aquariums, we recommend that you contact us directly at +33 (0)4 22 44 22 71.

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 5 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 12 reviews

  • 5

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

  • 4

    Very good product, it reduced the Ciano in my tank (Translated review)

  • 5

    Great product, very effective. I recommend it. (Translated review)

  • 5

    Amazing product, effective cyano treatment. The addition of bacteria makes it possible to push back the cyano without degrading the aquarium. I'm going to focus on a regular addition of bactofresh to maintain the water and contain the cyano which in any case never disappears. When it's good, it's worth mentioning. I recommend it! (Translated review)

  • 5

    The cyano disappeared in just 10 days and has never returned. I recommend it 300%. (Translated review)

  • 3

    after 6 days of treatment. small decrease to see in time (Translated review)

    Merchant's answer

    Hello Bernard, thank you for taking the time to give your opinion. We are delighted to see that your cyanobacteria have decreased. Do not hesitate to share your aquarium with us by email or on social networks!

  • 4

    I don't know if it kills the cyno bacteria, but the red freshwater algae do, I have a lot less of them but still some green algae (Translated review)

  • 5

    Incredible product, no more cyano after 4 days already! And my living is doing very well and the plants too! Take without hesitation really! I don't usually comment on products but I'm bluffed! (Translated review)

  • 5

    Top. Effective after 6 days (Translated review)

  • 5

    Worked perfectly, no more cyano after 6 days of treatment. (Translated review)