Got this guy for free from saltwaterfish was curious where I went wrong tank has been up for around 6 months now and the nem was acclimated for about a hour, is it dead? It’s foot is still holding strong and it moved to where it is on its own it’s just covered in a nasty slime that looks like something I won’t say. It’s a green bubble tip about the size of a quarter. Edit: calcium etc is all where it is supposed to be, I think it may of been me picking it up and moving it into the tank?