Macro or nuisance?

JBulk09

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This strange algae started growing in my refugium so I left it alone, it is slowly starting to appear in the dt on the rock. Its a translucent green and it is almost like a hollow stalk. Any ideas?

20201202_203306.jpg
 
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JBulk09

JBulk09

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This is a picture of it on the rock in my sump, hope this helps
 

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