Heartbreak hotel

[Delphinus]

As tempted as I am to blame the house or the new location, that of course opens the door to more sinister questions like is it even safe to live in it? I would hope that this part is OK.

I'm actually not running carbon right now. I can always put some on though, guess it can't hurt. I'm sort of wondering if running UV might be something to look into.

Old tank syndrome is also something I've thought about. I think that this is a mix of both "documented and explainable buildups/depletions" and "something we just throw out there when we can't come up with any other plausible explanation." Ultimately there is so much going on at a level we can't really perceive it's really hard to come up with simple one-tiered approaches to problem solving.

[PoonTang]

Did you dip the frag before you added it? perhaps this did some damage although it doesnt explain the rest of the corals. I doubt chloramine is the problem or else you would have sick fish too, although mabey you levels are still low. Try an ammonia test. Do you have a TDS reading from your RODI, mabey your membrane is shot? Try running a different salt and definately run Carbon 24/7. Another thing you should try is routing your skimmer air intake outside the house. It could be related to new/old house syndrome, cooking,do you smoke? almost anything but you did state it all started when you moved so most likely its either the air or the water at the new house.