Go to Aquarium Design Group's online shop. Order anything ADA, even the cheapest thing (you know you want to) and you will get a free copy of their 2010 catalog. Buyer beware: check with them to make sure this policy is still in effect. There's PLENTY of good reading there including guidelines on this topic. I honestly don't understand why more people haven't taken advantage of this.
Also the information you are looking for might be here:
http://www.aquajournal.net/na/index.html
PS: I have no financial interest in ADG or ADA.