In the beginning of keeping my facny guppy, i overfed him just a bit, and the excess food of course fell to the bottom. It's been about a week and a half, and the food looks a little fuzzy. So, is this a fungus, is it dangerous, will some kind of fish eat it and not bother my guppy, or do I need to clean it out some other way? Do I need to worry about it in the first place? Help! Thanks!