I just learned yesterday that there was a Petco about 8 miles from where I work so I decided to ride down at lunch today. This is the only one in Charlotte, NC. There regular tanks looked pretty good. Not spotless, but no dead or even struggling fish (they even have saltwater). I walked into their display and the lady was changing the water in the betta cups. She said they did it every 3 days. These were 16 oz cups and they were FULL of water. The bettas had room to actually swim rather than lay on the bottom of the cups. You could also see them very well to tell what they looked like. It's still not a full tank to themselves but a lot better than most places. They were all so pretty, it was hard to walk out without buying any.