Hey guys, doing a fishless cycle using Dr Tims ammonia and brand new CaribSea Liferock. It’s been going good for a few months and the cycle has been finished, but haven’t added fish yet. Today I noticed what looks like little trees on my rock. I’m thinking Hydroids, but not sure if they can show up in a brand new setup? I run the lights at a really low setting for a few hours at night just for aesthetics. It’s an AI Prime HD about 9 inches over an IM Nuvo 10. Attaching a pic and any help or suggestions greatly appreciated. Thanks!!