My male betta has developed small red spots on his side fins, but he really doesn't seem to notice them. He is red, so I can't tell if he has any more spots on his body. He also has begun to have problems eating; he'll try to eat, but he can't seem to get the food... he "misses" it. The food is a smaller-sized pellet, and he hasn't had trouble with it in previous months. I'm not sure how old he is, I purchased him about a year ago and he has grown dramatically. He lives in a 1.5 gallon tank with a filter that creates a small flow of water, and his tank is usually kept at the proper temperature. I worry about him, especially his eating troubles, because he will try a few times to get the food, and then will get frustrated and dart away from the food. I also have a strange bright-orange growth on the air hose that I can scrape off when I clean the tank, but never seems to go away. It smells musty and has stained the hose. If someone could help me, I would be very grateful!