Join Date: Jul 2010
Location: Outside Philadelphia, PA
In my opinion, the definitive book on FW fish is still Freshwater Fishes of the World by Gunther Sterba. I don't think you'll find a book that gives better general information on just about any FW fish your likely to run into. This is not a picture book, although the fish are illustrated. The book is also about fish, not about equipment.
In addition to Encyclopedia of Aquarium Plants by Peter Hiscock, which is very good, the book Ecology of the Planted Aquarium by Diana Walstad.