[archer772]

How much substrate should I have for a planted tank as in how deep should it be???

Thanks

 

[khanzer22]

Average depth is between 3-5 inch... Some goes even more than 5 (at the back section)...

 

[Hoppy]

I think 3 inches is a good minimum depth, but I'm not sure if there is a recommended maximum depth. It is very hard to hold a slope in an aquarium, so unless the tank is very big, a 3-5 inch range may be the most you can maintain, if that.