Posted: Tue Apr 24, 2007 7:23 pm
Did the bite break the skin?
Watch to see if this happens again/repeatedly and keep an eye out for signs of bullying. If it seems to be only happening when they're competing for food, consider feeding them separately, or at least feeding them in different areas of the tank (don't just drop the pellets in and let them fight for them). If you start to notice biting when there's no food involved, they might need a bigger tank, or need to be separated. (How big is the tank they're in?)
At the size you wrote they are, feeding every other day is fine. What are you feeding them? How much at a feeding?
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-