Jun 12, 2013 #1 TangoTank Aquarium Advice FINatic Joined May 4, 2012 Messages 519 What are these on the back of my powerheads & sides of the tank? Thanks!!
Jun 12, 2013 #2 U User Name Aquarium Advice Regular Joined Nov 23, 2012 Messages 70 Spirorbid polychaete. No worries. Sign of good water quality. Just a pain to remove if you want to clean them off.
Spirorbid polychaete. No worries. Sign of good water quality. Just a pain to remove if you want to clean them off.