Yes, hopefully! Warm clean water almost always does the trick! I'd sleep on it and check on him in the morning. I would love to know how he is doing tomorrow! Unfortunately sometimes our little finned friends are just weird and like to freak us out, haha :p
Thanks for all your help with my new fish! I've now been watching him for almost 5 hours, and he seems to be doing OK. (So much for sleeping tonight.) His pale color and stress stripes are now becoming what looks like blue and red! (Who'd have guessed it!) He's also starting to investigate his new surroundings, which is a good development. Thanks for all your advice!