Planted aquarium

Since the fish section on here is kinda dead does anyone know how much dirt I would need for a 65 gallon tank it's rectangular it's more square

Can you post the length and width of the tank? I think that might help, although I don't have any dirted tanks.

I'm actually into planted aquariums/aquascaping too. Are you going for the dirted planted tank for the first time? This needs a lot more research than one might expect, or you can easily end up with a gigantic messy failure and dead fish (if you use the wrong type of dirt).

http://www.aquascapingworld.com/thre...to-guide.8217/

Also be aware that if you use peat moss, it will make your water very yellow for a long time as you wait for the tannins to soak out.

How much dirt totally depends on how thick of a substrate you want. Going by 3~4" of substrate maximum is easiest.