I noticed a white tube like thing coming out of my zoas about a month ago. I didn’t really think anything of it until I saw another pop up around my acan. I’ve never seen anything come out of the tubes and they don’t seem to be irritating the corals in any way but would like to at least know what they are and if I should be concerned about them popping up. The acan was on its way out and is in the process of bouncing back. Thanks in advance for any insight! 
