What threads/stickies on R2R are great but forgotten?

[DeepBlueSomething]

Like the title suggests --

R2R is so full of information and resources -- I know there is tons of incredible information that I haven't stumbled across. Help bring some of your favorites to the top for the forgetful and new among us?

 

[Diesel]

https://www.reef2reef.com/threads/tips-and-tricks-on-creating-amazing-aquascapes.97209/

https://www.reef2reef.com/threads/202-gallon-diesel-tank.109424/

https://www.reef2reef.com/threads/im-bored-lets-see-your-reefs.220447/

https://www.reef2reef.com/threads/toys-for-kids-2016-lets-make-some-kids-happy.276313/
The last one will return soon and can't wait for that one.

 

[Randy Holmes-Farley]

Every thread in the chemistry forum.

 

[Diesel]

Every thread in the chemistry forum.

Now that was funny Randy