I walked by my tank a few minutes ago with my flashlight since the house and aquarium lights were off and I noticed a little worm on the bottom. Well, I thought I saw one before so I looked and noticed quite a few of them moving around. I managed to catch one to try and get some PID on it. I assume it’s a type of bristleworm but beyond that, I’m lost. Anybody out there know for sure what kind these are?