I recently learned that Corydoras will sometimes release a toxin when they feel in danger, and end up self-poisoning and often killing themselves within a few minutes. I'm about to purchase four more Emerald Corys from the pet store and can't help but be concerned. Seems like it would be best to have them bag each Cory individually with as much water possible. Does this sound like a good idea? Any other precautions to take during transport to avoid this? E.g. place the clear bags inside a paper bag to keep the light levels down?