AlgExit
Clean water without algae
Algae are produced when an aquarium is not well balanced. Causes of
an unbalanced aquarium are the excessive feeding of fish, too many fish
in an aquarium, excessive lighting or excessive fertilization. You also
take them home when you purchase fish or plants!
Add 10 ml per 100 litres once a week for four weeks. This period may be extended if algae still remain or if spores continue to germinate.

Blue Exit is the new way of getting rid of blue-green algae (cyanobacteria)
without using antibiotics or compounds which contain copper.
Remove the adsorbent materials (such as active carbon).
Shake before use.
Dosage: 10 ml per 80 litres daily over the course of 5 consecutive days.
The cyanobacteria disappears within 10 days after the last dose. As from the first dose, until 14 days later, do not replenish or change the water, nor make use of absorbents.
As preventative: 10 ml per 80 litres weekly.