I stressed my dwarf Gourami. How can I reduce stress?

My dwarf gourami had a stone stuck in its mouth for about 6 hours. I got panicked as the fish wouldn't even eat, I net him and got a pair of tweezers, I managed to get the stone out. The fish was out of water for about 1 minute and I supposed that stressed it too much. Since I let him, he seems kinda weak, scared, hiding behind a driftwood. What can I do to reduce the stress? I put some prime and turned the lights off. What else? Will he be alright?