What is this

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I'm not sure what you're asking about but all I see is what looks like cyanobacteria and green algae... or a rock :)
 
The purple stuff?? Coralline, an algae that makes the rocks look pretty. It's actually something a lot of people encourage to grow.
 
The purple stuff?? Coralline, an algae that makes the rocks look pretty. It's actually something a lot of people encourage to grow.

Oh wait, I take that back now that I look closer... Coralline grows out in like irregular wavy-lined circles.
 
It you wnlarge it it is not coraline or cyano... It looks like little red plants or leaves
 
It's Coraline algae.That the way it looks starting out.You will see color changes as it grows.
 
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