im closing my in ground, followed all the steps that I can found, water good, add the chemicals, drain the pool under the skimer low the lines with the compressor, add the rubber plugs on return lines ..... my pool like most of the pools have a central balance return in the bottom of the pool the pool is really old so this is connected to the skimmer my skimmer have 2 holes one is already cover with the long winterize device the other one i did plug BUT I know is full of water ... what would be the step tp sealed ? it will stay like that? don't want the pool to get damage
