Just some help.

[cocowizzz]

Hello R2R! I was looking at my tank today and noticed my zoa rock looks diffrent I also found a polip floating around the tank from that rock. It seems fine. I dont get why it would detach. Also the coraline alge looks like its dieing on just that rock. Anyone have any ideas? Also had a pretty sizable diatom spike past week or so. 10 gal mixed reef set up for about 5 months