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Algae ID

ExcitableBoy

Member
Joined
16 Jan 2016
Messages
46
Location
Milan, Italy
Hi all!
Could someone tell me the name of these algae?
Most of my plants have their older leaves covered with these dark green algae.
Maybe GSA? I think I should dose more P and probably N too, because there are also some GBA on the tops of Ludwigia Cuba and Syngonanthus.
 

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From the colour/pattern it could be GSA, GDA, BGA, a combination of these in a biofilm or other types. Looks like the start of BGA to me, not 100% without seeing/feeling it or at least clearer macro shots. Luckily it doesn't matter unless you are interested in the algae. If you think you need more N and P, you probably do! No harm in adding a little extra if not anyway.

Healthy plant growth is the best way to reduce algae regardless of species :).
 
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