So I cleaned my bettas tank today, doing a 100% change since he's currently in a 1 gallon (vacation). I put in the the stuff for the chlorine, rinsed his plant off and rinsed the rocks. I checked the temperature and let him get acclimated to the water. Once I put him back in he won't veer from the top of the tank and it appears that he can't get enough air. He even turned silver in his face a little when he was put back in. He's not his normal vivacious self and I'm hoping nothing is wrong with him even though I sense there is. Anyone have any suggestions of what could be wrong or what I should do?