Hi all. Since I had a little extra time over the holidays I figured I might as well go and test the pool. It has been closed for about 2.5 months. Has a mesh safety winter cover. Temperature is right at 32, since I had to break about 1/4 inch of ice to get to the water. At closing I raised the chlorine to SLAM level - it was at 24 the night before closing. I did not add polyquat or any other algae prevention, just chlorine. Yesterday the chlorine level was 9. It was a pleasant surprise to still have that much chlorine present. I thought that the chlorine would have all been used up with the sun and dirt that makes it through the mesh, but am happy to be wrong in that guess.