[Dentoid]

Not sure about when peak oxygen levels occur. If your sump water is churning and the surface water of your tank is moving, then I would assume gas exchange is taking place. I think BS are pretty resilient. Mine was in a bag for 24 hours, then in QT for 48 before he went into the display. So far he seems fine. Perhaps the ones you got were suffering from shipping stress that wasn't readily apparent. I have read that they are typically not collected using cyanide, because they are easy to catch with a net. If they were eating then they were most likely not cyanided. I know I've said this before, but head trauma seems very likely with them being jumpers.