Ottos and Algae

[Brandxn]

I have 6 Ottos in a 20 gallon tank that had some brown hair algae and some of what I think is green algae. They absolutely obliterated the brown hair algae but they won’t even come close to eating the green algae that’s growing all over the plants. Do they just not eat green algae or is it another type of algae and if so how do I get rid of it? Attached are some pictures of the tank. 

[Zenzo]

On 5/14/2022 at 5:54 PM, Brandxn said:

I have 6 Ottos in a 20 gallon tank that had some brown hair algae and some of what I think is green algae. They absolutely obliterated the brown hair algae but they won’t even come close to eating the green algae that’s growing all over the plants. Do they just not eat green algae or is it another type of algae and if so how do I get rid of it? Attached are some pictures of the tank. 

The green "algae"in your photos is not algae. That is actually cyanobacteria, which the fish won't eat. The best way to get rid of it is to use an antibacterial medication like Maracyn or Erythromycin (same active ingredient).