One day i was changing water. I accidentally tapped the edge of the tank. Then the betta fish freaked out and swimmed away like crazy and hit the glass. A few minutes later, his color changed from red to pink red. He now changed to red again, but he doesn't follow my finger anymore, and stay under his bobble nest most of time, and doesnt move much at all.
He is not blind, but respond very slow now. He used to react to my mirror 2, 3 seconds after I put a mirror next to him, now it takes like 10 seconds.
Now he is just stay at the bottom of the tank.
What should I do now to make him feel better. Is he going to die? :(