Cyanobacteria – Blue Green Algae

Blue Green algae is actually bacteria covering the surface of plants and objects in the aquarium forming a blue green coat that looks like algae.

Once Cyanobacteria appear in the aquarium, if not resolved they might cover everything up and cause disaster. They saffocate the plants thus rotting them down causing low oxygen levels which might cause oxygen dependent organisms in the aquarium to die.

The one way known to work well on removing Cyanobacteria, is to increase NO3 levels and to completly cut off light in the tank for 3-4 days. Cover up the tank so no light at all reaches it but also add oxygen just to be on the safe side. There are also cases where addition of Seachem Excell or EasyCarbo which are both liquid forms of Carbon in parallel with the increase of NO3 levels, cause Cyanobacteria to decrease over a few weeks untill they completely vanish.