What exactly does a betta do in a 10-15 gallon tank? i have always seen betta's in little jars or bowls so i dont really know what thier normal behavior in a big tank should be. therefore i dont know if the way he is acting is normal:
Regularly swimming to the top for Air, but the returning to the corner on the bottom where he stays most of the time.
swimming through the bubbles of the Air stone and riding the current to the top.
he looks like he is having fun but the sitting in the corner worries me a little.
please let me know what normal behavior is.