Can you tell me what this black cover is? Is it a ground cloth or a winter cover? It feels like a heavy weight felt. We are hoping to have a second attempt at doing our pool build in about a week and I don't know where this may go. If it is a ground cloth - what is the consensus? Use it or just good sand for the pool bottom?
The second photo is the other cover that came with the pool. I am thinking this one may be the winter cover.
THANKS or your help!!