Hi, so I have a 10 gallon tank with a male betta and 2 cory cats. They've been together for about 2 months and everythings been fine. They've left each other alone for the most part. Actually, I've seen whay looked like, the betta and corys playing together. No flaring at all. So, all of a sudden about 3 days ago, he became super aggressive and very skitish. He sits at the top of the tank all day and sometime darts around the tank. He even flared at me tonight when I was feeding him. And yes he is eating. Hes usually very active and is happy to see me. After I turned the light out tonight he immediately started attacking the corys . The water parameters are fine, and nothings changed. I've read that when they are ready to spawn that they can act like that but I'm not sure that's it. If it keeps up I'll have to remove the corys but would love to be able to keep them together. Any help or advice would be greatly appreciated.