I purchased this coral a few days ago along with some other leathers and a GSP. The other ones are doing great, as was this guy, until today. It never really extended it's polyps, just a little bit, but it looked healthy. This morning when I got up, it was limp and the stalk was bent over. It's now 5PM and it has turn a greenish color as opposed to it's original pink and it has several orange spots which I assume is dead coral.
My parameters are good (the other corals are doing great) although my salinity could be a bit higher (it's a 1.024). Is this in fact a dying coral and, if so, what can I do to hopefully revive it?