I'm trying to get my first coral plugs from a fellow reefer, however they mention that there is this "reverse coral" plug on top of the zoas that can't be removed. I'm a little confused... he says they can never be removed and has had them for 5 months???
Here's a pic in the center a little to the left
what is it and why can't it be removed?
Here's a pic in the center a little to the left
what is it and why can't it be removed?