This is the only fake plant in this tank. JBOT knows this tank because he was giving me lighting tips
I took some photos, but can take more clear ones if needed. The algae on these plastic plants used to be a brown color. I was getting the brown algae on some live plants as well... but got some otos who made it through a QT and then were placed in this tank who ate it all right away! The brown algae went away (I was also adding more live plants at this time) and now I'm getting this very pretty green algae on the fake plants. I don't think it comes across as well in the photos, but in parts where the green is more clustered, a beard grows, making me wonder if this is the start of a hair algae?
Here are the pics:

