Someone asked for info, so here are some links. Browse to your heart's content. Some are specific to particular areas; some are general. Feel free to add on any site you find useful as this is not an exhaustive list.
Lighting, basics, disease, SA cichlids etc...
http://www.thekrib.com/Everything catfish as the name implies
http://www.planetcatfish.com/Newbie articles, basic tank chemistry, etc
http://www.drsfostersmith.com/pic/ArticleNav.cfm?d=158&category=266&c=3578look up fishes by name
http://fishbase.org/search.phpOur very own GPASI articles. There are some older articles posted here that newer people won't have seen in the recent publications.
http://articles.gpasi.org/Wild betta articles. If you go to the species link at the top left, you can browse all the wild betta species by name and each has a page of info on water requirements and breeding.
http://smp.ibcbettas.org/articles/index.htmlI think you may need a password/login for this UK site (my computer stores that stuff so I don't remember) but if you do it was free last I checked! Latest news, articles on all sorts of things including an article section for those new to aquariums. Plus some nice photos of other members' tanks. Pretty cool site.
http://www.practicalfishkeeping.co.uk/pfk/pages/home.php