A while ago I posted about suspecting our betta of having cotton tail disease. His fin had a fluffy ball in the middle, then that fell off, and although I spotted a couple tiny white bits at the end of one or two other fins.. they didn't get bigger, and he doesn't have any noticeable fluff on any of his body right now. We went away for a week and left him with people who looked after him, but they worried about him because he wasn't eating, which as far as I recall he was doing okay with before we left - if just a bit less than normal. We got back 4 days ago, and he's come back home but he's still not really eating. First days he was just sort of sitting on the bottom. Now, it's winter here. We suspected he might be cold so we put the heater in. (first at 20degrees C, and up to 24 today) He perked up a bit initially at the heater, then he started hanging near the heater, and now he just sits around the tank around the top but not necessarily near the heater. And he wont eat, and he isn't his usual self where he swims up to people.. he just pays no attention to anything. I don't know what's wrong with him... any ideas?