Luke it will be best to move (diet) under Feeding and Nutrition , this way this topic area will be open for Urgent Care.
As far as diet this will be a good read :
http://www.redearslider.com/pellets.htmlAlso :
http://www.redearslider.com/plants.htmlAlso it's always better to under feed than over feed ! Overfeeding will cause all kind of health problems.
How big are they and how long you had?
Let go under Feeding and Nutrition.
There are informational stickies above post that can help you.