Ah, I think you mean the links in the TFF FAQ Topics section. A lot of those are out of date, and some of them are in the currently active forums - Tropical Chit Chat is now Tropical Discussion and Beginner Questions is now New to the Hobby Q & As.
I'll have a look see what I can find to re-instate.
Cycling Your First Fresh Water Tank What is Cycling and Why is it Important? Fish waste, and especially fish breathing, plus uneaten food and other organic matter breaking down in a tank all produce Ammonia. This can quickly become toxic to fish if it is allowed to build up to any measurable...
I've just realised there was reference to a post on testing which had 'coming soon' after it and this looked like a link. It wasn't a link and the post on testing was never written. I've removed that sentence as it's no longer applicable.