I just had what looks like BJD ravage through a whole beautiful rock garden of Metallic Green Ricordea, melting them all within 4 days. It also killed a few of those common orangish brown Discosoma. I have a few other Rhodactis and large unidentified purple ones that seem to be unaffected. It started with a brownish gray scum around the perimeter and went quickly to melt down with a pile of brownish gray slime leftover. The rest of the tank looks awesome. How species specific are these disease outbreaks? Do I need to be concerned about my other corals (Xenia, Leather, zoas, Montis, Pavona, GSP)??