That depends completely on the slope that you're trying to compensate for.
Figure for two inches at the high point, but settle for one.
you put a couple of inches below the liner of your above ground pool A: Taken literally, why would you want to put sand IN your pool?
First question: Why do you need sand. and two: You need another dimension [such as height] to have area right?
about 2" to 3" i.e 50mm to 75mm
under ground
Cabbages grow above ground
No, they are under water but not under ground. There is no ground above them.
sunflowers grow above ground .
No
They grow above the ground. On a tree. Have a look at Wikipedia.
It should be placed under the clips.
It depends if you under ground Or above ground because you can follow Where you dug if your above ground you can't
Below ground.
No roots are not located under the ground
Rocks with small crystals form above ground, because when formed under ground the magma makes the rock cool slower causing more time for the crystals to grow. Above ground the rock cools faster, because the air isn't as hot under ground than above ground.
carrots