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 My Aquarium Showcase Joined Jan 29, 2012 Messages 8,812 Reaction score 9,042 Location California Rating - 0% 0 0 0 Looks like arrow worms to me, which are pretty harmless.
