Don't leave uneaten food in the tank (will create amonia) give them time to come around. It might take a few days. Hopefully, they weren't too severely affected. But it sounds good.
And as mentioned above, don't forget to add a dechlorinator to your change water, either directly to the change water, as I do, or to the tank.
Gee, I feel like I helped save some fishy lives, isn't this cool ? 2 thumbs up.