Despite the fact that the internet is full of information about every aspect of aquarium keeping, it still doesn’t beat a good book. The web is full of great facts and truths, but anyone can put information onto a forum or a blog, even if that info is blatantly incorrect. Book, on the other hand, aren’t authored by random aquarium keepers from all over the net. Instead, they are usually written by well respected folks who have a lengthy history in the aquarium trade. So, chances are that information will be more factual. In the off chance it’s wrong info, it is probably not rooted in a misunderstanding of how aquarium work, but probably outdated information since books are only updated with new editions every once in a while.