I have got a few questions regarding what a beginner should read and know. The easy answer is as much as possible however I have compiled a list on a few articles that I think is particular suited to read as a beginner.

Water Chemistry, For Dummies

Pat's Basic Guide to a Successful Freshwater Aquarium

Water Chemistry, For Dummies

Pat's Basic Guide to a Successful Freshwater Aquarium

Fish Food, for Dummies

/William