I'm having some problems with my betta's tank, and I want some opinions. He has a one gallon corner shaped tank with an air pump in the middle. On the first two days, everything was running fine. The air pump didn't make much of a current, and Deimos seemed to be doing fine in it. Yesterday morning I woke up to find the top of the tank was absolutely covered in bubbles, so I turned off the air pump. The bubbles died down, and he seemed fine the rest of the day, so I thought everything would work out okay. I had to go somewhere today, and didn't get back until late, so it took me awhile to notice my fish was having problems. He was hanging out at the top of the tank, and would just sit there. Deimos is a relatively active fish, so this is kind of strange for him to be doing. It appears as if now he isn't getting enough oxygen in his tank, and so I'm utterly confused as to what I should do. Should I turn the air pump back on, and hope that the bubbles don't hurt him, or should I keep the air pump off and hope he adjusts to the smaller amount of air? Or should I get a different tank, seeing as this one just doesn't seem to be working well for a small betta like him? I'm a newbie at Betta care, so feel free to rip me to pieces. I just want Deimos to be okay.