The first year my winter cover was water proof. I would have to pump it off after a heavy rain or snow melt. When I opened the pool the water looked like the day I covered it.

Now 3 years later the cover fills up with pool water anywhere it touches the surface, and when it warms up the alge starts growing and leaches back into the pool. when I open it, it still isn't as green as it was pre cover but green nonthe less.

I was wondering if it would be adventagious to cover the pool with a sheet of 6mil plastic than put the black cover over?

15x30x48" o.g.