I have an ill female betta. I bought her from a reputable, locally owned pet store around August 2013. For the past couple of months she has gradually stopped eating. I've observed her attempts to catch, swallow and digest food but either she can't even swallow it or she spits it out entirely. She swims in an erratic fashion and looks malnourished. I've fed her hikari pellets, micro pellets, and freeze dried bloodworms. Her color looks pale, and I actually don't know how she is still alive, but it appears she is starving to death. There are no visible signs of external parasites or damage. I do not know of a practical or affordable method to treating internal parasites/injuries. I change her water once a week, usually add a small amount of old water to new, use conditioner and wait until new water is room temp. I've been treating her consistently with melafix but her eating habits have not improved. She is housed in a half gallon tank in a room that averages temps between 55-75F. I'm at a loss and don't know what to do. I can't stand the idea of her starving to death. Please help.