Lopsided 18x4 intex round easy set pool
I started out with easy set pools a few years ago and finally gave up and went to their steel supported ones.
I have put up over 20 above ground Intex pools and have learned a few things in the process:
A: The larger the pool with the air ring at the top the more difficult it is to fill to its maximum potential.
B: Eventually the pool is going to collapse with people in it, especially if someone leans over the edge with their arms on it which is a perfectly natural thing to do.
C: It is virtually impossible to get an area beneath the pool level without scraping the ground and measuring it with, in your case, at least a 16' long 2"x4" on its edge with a level on it.
D: Trying to build up the ground on one side with sand will eventually result in collapse of the pool.
E: There is a type of stiff styrofoam ring that you can buy in sections to go around the bottom of the pools, but that will also result in collapse unless it is used for what it was developed, and that is a rigid wall pool.
F: Out of the three types of pools that Intex sell, the easy up with the air ring (the worst), the steel supported all the way around (next worse). and the rigid side, only the rigid side is forgiving to a tiny degree where unlevel ground is concerned.
For your size of pool everything must be exact and completely level or at one point it will collapse. There is little more discouraging than seeing all those gallons of water run out onto the grass. Once the water goes over the edge, no amount of people can prevent the collapse.
Finally I have learned that, with above ground pools, you get exactly what you pay for. My 5th above ground Intex pool was the best, but even with the ring around the edge at the bottom and the rigid side, I was still wasting my money unless the ground was aboslutely level. You just have to cut away the dirt until the level shows no angle.
I wish you all the luck. If you feel a desire, I have 5 Intex pools in my barn I will give to you if you pay the freight. Each was a dissapointment and a waste of time, energy, and above all, money.
I finally spent about $750 on one, had a professional crew level the ground, and it stays up through the winters even.