Reasonably after a couple/few generations any effects of the bleach should dissipate. You would just need to gauge the life span.
Yeah I'm also wondering now if the die off was related to my move as well. They're being kept in my garage now which doesn't have as good ventilation or temperature control. They are also bursting at the seams and might be overcrowded. Also I found an intruder in my Surinam bin - a brown banded roach. I'm planning on making better bins, transferring them all over, moving them to a different location, and seeing how they do.
@Klyde O'Scope I have a colony of Discoids and Surinams.