Gang, I'm sorry to hear of all these unfortunate incidents. This does however, harden my belief that most "solutions-in-a-bottle" are risky, dangerous and in some cases border on voodoo reefing. Once in a while, out of grasping at straws, I'll try one and every time I do, something dies. I lost a huge yellow porites to Chemi-clean. I lost a couple specimens to some gunk called "No-Cyano". Most recently, I tried "Flatworm Exit". Guess what happened! I lost a Chip's Acro.
Many people use these SIABs (solutions in a bottle) with great success and good for them! I'm always glad when it works out. Frankly folks, they scare the living mierda out of me. In addition-- most often IMO-- they treat a symptom while the disease goes merrily on.
I'm sorry to hear of these tragedies and anyone who has been in the game longer than a week-- myself included-- has one they can share with the group.
My talk at the next meeting will address these issues and many others. I have yet to actually write the speech and even if I had, I would keep it under wraps until the day. (So I'm sorry, but no... I won't give any "sneak previews". No amount of PMs or begging will change my mind-- so those of you who always badger me will just have to be patient. You know who you are!)
By the way, if I were you, I'd do a 30 to 50% water change with water that has been aerated and aged for at least 8 hours. Yes, it is a further shock to the xenia but if there is a toxin in the water, the xenia are probably better able to deal with the large water change better than the toxin. This is however, a judgement call YOU will have to make. If the Xenia is already so traumatized that the additional shock from the water change might push them right over the edge... then I STRONGLY recommend you IMMEDIATELY put a BUNCH of high grade carbon in your filters. Carbon may not remove the toxin, but it might. It certainly won't do any harm and IMO and experience, it will most likely help.