Leveling an above ground pool?

To level for an above ground pool simply take a full bucket of water and put a plastic tube in it that will reach every part of the area where you intend to put the pool. When the tube is full of water (NO AIR BUBBLES) You will find that the level at the end of the tube is always the same, so if you measure down from the water level in the tube at the lowest point of the slope where the pool is going to be you will know how much to dig out every where else.