mysterybox;625925 wrote: I would look at your water quality closer before you go crazy looking at what might have dropped in your tank from bird above........
phosphates & nitrates might be your answer......I don't recall what your ALK is though. I'm sure that is fine since you had that tested by Jenn.
There are only a few kits that can test phosphates in the low enough range meaningful for corals.......
I would add carbon, change out after 48 hours or so, then maybe every 7 after that. I would do twice a week water changes, then once a week, etc.....until all was well.