What i'm trying to say it that the ph of the store could of been different to your tank, this is why you have to know the ph so you no how long to climatise them for.
he was fine when i got him.he was fine yesterday evening and when i moved the rocks one of them rocked and i lifted it the other swam away but he was sitting there motionless.i pushed him w/ my finger and he started goin crazy twistin and spinning.and i aclimated him for about 1/2 hour