green coraline

i have some green coraline starting to grow on the sides of my tank and in the front towards the sand bed. there is a little bit of purple but mostly green. will the green turn into purple?
 
Sometimes; I have some patches that have been green for a year now (pretty lime green color). I have had minor success with purple coralin but have great success with orange, red, pink, and green. I actually think that the other collors are nicer.

Good Luck
Ariel
 
How do you tell if it's green coralline or regular coralline with green micro algae growing on it. I've never seen green coralline before. I have seen bleached coralline with green micro algae growing on it. Anyone got pics of their green coralline?
 
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