I’ve ordered these a few times over the last year or two trying to build up a little school and they’re a bit tough to keep. Only have 4-6 left in my little school. (Not aquahuna’s fault as they do usually appear healthy. )
Even though mine live in a shrimp tank without a lot of food competition I suspect keeping them well fed has been my difficulty. (Consider a powdered food that distributes through the tank because I think they get intimidated away from pellets sometimes and get weak.)
All of the shrimp arived alive. lost one during aclimation. the rest have done really well.
I ordered 6 pygmy corudoras and they arrived alive and healthy. They are still in quarintine and as far as I can tell they are all still doing fine. They hide under leaf litter and are tiny. Can't wait to move them to their permanent tank.