My tank is about a year old. These white/translucent worm type things are all over my rock and back chamber media now. At first I thought they were pineapple sponges and then I was told they were colonial hydroids but when I search that these things don't look anything like those. I was told they are impossible to get rid of, they seem to prefer being under rocks not directly exposed to light/flow. I'd like to ID these things for research purposes. I just started an upgraded tank and I'm scared of infecting that tank with these pests.
