I have a 4" GT that has stopped eating. It's been a long time now... about a month I'd say. He isn't interested in feeding time at all, but sometimes he'll take pellets in his mouth and immediately spit them out. He used to love those pellets. He seems to only eat bloodworms (I feed one or two cubes a week) and even then he's not very interested. He's lost a little bit of weight but still isn't skinny. He looks completely healthy, swims around a lot, and still comes to the glass to say hi. Any ideas? He used to eat quite a bit, and has completely lost interested. Parasites maybe?