I wish I knew exactly what happened to the ones the didn't make it. I think that they ( Haddonis ) are actually poor shippers, and I got lucky with my blue one -- that came in perfect and settled in right away.
They look good for the first day or two, and then go down hill from there. Have even tried them in one of my tanks that his two healthy ones in there, so I don't think it is a water quality issue.
Just found a cool looking one that should be here later this week -- pending on the weather, there is a chance that it will be held because it is going to be pretty cold.