My new male Dragon Scale Betta named Kinga is not doing well. I got him about two weeks ago from Petco. His tank had been cycled, and for the first week he did very well. Now, he is acting very sick. He has clamped fins, and is hiding under my marimo. He is breathing heavily. He still eats, but it's very worrying. He'll take it, and then spit and try and eat it again. But as he does this, his gills are spasming and white stuff comes out of them. I can't tell what in the world it is, or how to help. It doesn't have the appearance of any fish diseases I've ever heard of. After doing that, he'll go back and lie on the bottom of the tank. Please, has anyone heard of this? Can it be treated?