May 24, 2016 #1 alonso24k Active Member View Badges Joined Apr 5, 2016 Messages 142 Reaction score 45 Rating - 0% 0 0 0 Does anyone know what these are? I found them in my tank today? I removed both. Are they harmful?
May 24, 2016 #2 Lionfish Lair Renee View Badges Excellence Award Photo of the Month Showcase Editor Article Contributor Reef Squad Emeritus Joined Jan 29, 2012 Messages 8,812 Reaction score 8,301 Location California Rating - 0% 0 0 0 Looks like arrow worms to me, which are pretty harmless.
