Oh wow, I am so sorry. I was just trimming up the macros in a few of my tanks last night trying to to stir up too much. It's definitely a gamble we take with the horses. Bristleworms, flatworms, aptasia, etc, all of them can be so dangerous but so can removing them. I am bouncing back and forth between sterile, bare bottom tanks, and more natural environments, both have their pluses and minuses for sure.
If there is every anything I can do, please let me know.