So here's the deal. I have an above ground 24' "Bermuda pool". It's one of those pools with the white railing and catwalk around the edges. Therefore, you can't really anchor the cover over the pool. I bought a pool cover online for a 24' pool, it came with around 4' overlap. I installed the cover and it appears OK, but it's a little big. I can anchor the cover to the side railing. My question is water collects in the cover, it lays flat on the surface of the water. However water will collect in the cover (like a bowl). It it OK to simply let the water collect (will it damage the cover? Or do I absolutely have to have a pump or some way to remove it?