Hey, my betta has been swimming around erratically lately and not eatting. I feed it about 3 or 4 pellets and it wont even touch them anymore. It stays near the top and darts around. The body is losing color horizontally in two lines. The head is also looking paleish. anybody know whats wrong with my fish? Oh yeah, I keep it in a .5 Gallon tank because thats all I can fit in my room.