Originally Posted by carey
Could there have been some contamination? anyone clean near the tank with anything? With such good parameters it's a mystery. hmmm...
My wife wiped out a 55gal 2 tiered Lake Tang shell dweller tank once using Lysol spray in my fish room 1 time. She was "dusting" off the lids with it.
After the aftermath of that discussion and $500 later to restock, she didn't come near my tanks for 3 months.
That may not be your situation but I would try to think long and hard if anything different or out of the norm happened.