My fish always come in water a good 10 ppt lower than my tank water and since the fish I'll be getting tomorrow is a pod eater who will inhabit his own small tank I'm concerned the pods might die when I transfer the rock to the new tank from my old one (i generally match the QT tank to that of the fish's bag water to prevent osmotic shock but since he's gonna be the only inhabitant I'll be introducing the pods at the same time since i don't want him to starve)...will this sudden salinity difference kill the pods?