hi about a week ago, I bought a beautiful betta with metallic greenish blue mixed with pink outlines at the tip of the fins. the problem is, that for the first week, it seemed very active. I often saw it going back and forth against the glass. but then, now it seems to "sleep" on the bittom. it seems to be breathing fine, and I don't see any problems on the fish. the temperature is about 76 degrees. I also keep harlequin rasboras, and a cory cat with him. is this normal? I heard that most male bettas arent that active.