Anyways, now that all the silliness is away, there are a lot of websites out there now. 2 of the ones I visit and help out with as well as get help with is
Fish Geeks! and
The Planted TankBoth are good in their own right. Fish Geeks has alot of helpful people on there with good knowledge about freshwater tanks and diseases.
The Planted Tank is of course highly focused to having lots of plants and how to keep them alive.
I only have one site for Saltwater, but it's focus is mainly on how to maintain reef tanks and has some very good calculators for building your own tanks. The website
Garf is very good for that purpose. Enjoy!