Ok, so I go to pick up my first ever dat on friday night. My tank is all ready all water parameters are perfect and tempature is around 78* I head over to the pet store and see the two dats they got in for me. I take the one that is slightly bigger and more active. On the way home he seems very stable all bars are still there and he is activly trying to get out of the bag. When i got home i started to aclimate him first leaving him floating with NO WATER FROM MY TANK just to get used to temparture. i went to put water from my tank into the bag and my dat is sitting there DEAD. What went wrong? By the way the lfs tank temp was 78* too. So what went wrong was their water chemicaly unbalenced?