Yes by putting an even layer of sand down you will protect the liner from the irregularity's in the ground and absorb impact from above.
YES
Sand is normally put under the pool liner to create a smoother surface.
I just put up an above ground pool and we used sand to level the ground. To level the sand, we used one of those string levelers and tied it to stakes on each side of the pool area to make sure it was all level.
It could damage the internal PVC of the filter and cause sand to get in your pool.
You don't use sand to level the ground that the pool sits on. The sand is used on the inside of the pool, after the ground has been leveled by taking the highest point down to the lowest point after the grass has been removed. The manufacturer's usually recommend 2" of sand on the inside of the pool before the liner is installed. It sounds like you are installing a used pool, since you do not have instructions. Here is a link to some instructions that could possibly be used. http://www.royalswimmingpools.com/install.htm
Unfortunately, no. If the sand isn't level when you put the pool on top of it, the bottom of the pool will stay uneven after it's filled. Sorry.
Your filter will tell you on the side of it how much media sand to put in it.
Washed float sand.
Its not a good idea to put a plastic liner under the pool. It retains moisture and rots the walls and the rail the wall is in. Your pool will not last. If you follow manufactures instructions, sand under pool and a good drainage system around the pool will make the pool last 25 years or more. Whenever water sits against the pool walls its going to eventually rot the wall and can seep under pool causing the sand to shift and then the liner will go bad.Its all sales hype about the coving and gorilla stuff...its not needed.
Well, first you lift up the mobile home. Then, you put the sand under it.
That'll depend on the size of the pool.
Yes, you can use masonry sand under an in-ground pool, as it provides a stable base for the pool structure. However, it's important to ensure that the sand is well-graded and free of debris to prevent shifting or settling over time. Additionally, some pool installers recommend using a specifically designed pool base material, such as pool sand or crushed stone, for optimal drainage and support. Always consult with a professional for the best practices for your specific pool installation.