1. determine where your pool is leaking (liner or plumbing) and repair.
Probably ground water or condensation. The liner cannot leak unless it has hole in it.
If you have water behind your vinyl in ground pool liner, you should first lower the water in the pool to normal levels if it is over-filled. Make sure that the vacuum pipe is clear, unclog it if it is not. Once it is unblocked let the water from behind the liner flow out.
One cause is a leak.. A small hole/tear in the liner allows water to get behind/under the liner. Now, without the water pressure pressing against it (or, with equal pressure above and below), the liner 'floats' away from the ground/wall. If you see an increase in the number or severity of the wrinkles, you likely have a small hole somewhere...
form_title= Pool Liner form_header= Replace or install a liner for your pool. Do you need to replace an existing liner?*= () Yes () No Is it an in-ground or above-ground pool?*= () In Ground () Above Ground What is the size of your pool?*= _ 
sounds like there is ground water getting in there somehow
If water is getting behind the liner, sorry to say you have a leak. This will also cause wrinkles. Check around main drain if you have one.
Horn location on my '93 supercab is below the battery tray behind the inner fender liner.
Above ground: assemble the frame, add the waterproof liner, and fill. Below ground: dig a hole big enough to fit the pool, build a drain line, apply a liner of concrete or similar material, waterproof this, and fill.
== == I think you may mean How do you replace the above ground pool liner? Avoce ground pools usually have a vinyl liner. You do not paint them.
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?
Regarding pool: a liner refers to an in-ground or above ground pool that uses a Vinyl Liner to hold the water. The liner is a custom fit to the shape of the pool, in-ground pools utilizes steel, or composite walls to hold the earth back and the floor can be a thin concrete or a sand bottom.