I got home from work yersterday to find out ther had been a power outage in my neighborhood for a few hrs. The power was on by the time I got home at 6:30 and my fish looked fine. I have a large female in a 360 and a pair of large Leos in a 500. I was going to feed them at 10:00pm and I noticed my Leo in the 360 was in a corner breathing and gasping extremely hard. I figured something went wrong with the water so I moved her to my 500g with the other two rays which were doing just fine. I poured some stress coat and salt in there and watched her all night. She seemed a little more active today but was still breathing hard. I did a 25% water change and l left for work. Wish me luck guys. Any advice would be appreciated.