I have an Intex 20 foot. I saw online about adding foam or sand to the “cove” area between the pool wall and the liner. My pool just has the supports and a liner and no walls. But there is still a “cove” area that would be created just on the exterior of the pool. I figured it would be good to give support there but I don’t know how. The pool is not up yet. Thanks for any help. I’d also appreciate some links on setting up the pool as far as sand gravel etc.