Green spot algae question

[dw1305]

Hi all,

I'd love to have that on some of my rocks.

We have a <"few threads"> where people have <"grown them accidently">. I think the common thread is probably hard water, but this suggests it isn't a pre-requisite <"Hildenbrandia rivularis">.

This gorgeous, red plush, velvet cushion belongs to @EA James.

cheers Darrel

 

[Sanniejop]

I Always thought that if gsa is present on plant leaves it will stay there on it. I have some anubias leaves with gsa on it. I relate this to too high iron concetrations. But now I see that the middle of the spots seems to disappear. I have no idea how this happens. I have oto's siamese algea eaters and pest snails but when they are on a spot i never see it effectively eaten by them.
My question is, can the gsa spots partly or even completely dissapear under the right circumstances of water parameters?

 

[PARAGUAY]

Algae needs light as does plants, maybe a short blackout. Then less light or more shaded