heathlyng
Aquarium Advice Apprentice
I have noticed these tube like "veins" on my LR. Can anyone tell me what it is and if it is bad? Thanks so much in advance! 
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- Thread starter heathlyng
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mr_X
Aquarium Advice Addict
if they are hard they are tube worms. they build a tube out of calcium for protection. they won't hurt anything.
