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i've seen these in previous posts but since i didn't have them i didn't pay close attention. can you fill me in AGAIN? will they go away by themselves?
The spirals are calcerous tube worms and they are harmless and normal. The will not go away by themselves, most only remove them from the glass panels used for viewing (only 2 on my tank, but most use 3 panels to view) with a razorblade.