I would be careful. One week is not much time for for a cycle, likely hasn't cycled much at all. It is possible that some of your fish may survive. I would venture to guess that those chromis may live through it; the ammonia spike will be tough on the others. If your other tank is cycled, and still operational, you may want to consider QT'ing the fish you want most to survive. I think that most difficult aspect of this hobby is waiting to get a tank up and running, followed closely by the diet it places on my wallet.