White swirly egg casings?

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Paulyboy123

Aquarium Advice Regular
Joined
Sep 22, 2012
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58
Can someone please tell me what these egg casings are? Good or bad?
 

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Hey Paulyboy, the first pic looks like a Spirorbid worm tube. The others may be the same thing or the start of coralline algea spots, hard to tell.
The Spirorbids are a harmless, natural progression of a reef aquarium.
Best of luck with your tank.
 
I also have these little spiky slug things crawling in my tank laying the eggs all over the glass
 
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