I have a big fall leaf problem with trees around my pool . Old winter cover is worn out and purchasing new one now. Should I buy a cover in addition to one of those leaf net covers? I am also confused about use of air pillows. The installation instructions for covers say that the cover should lay flat on the surface of the water, but air pillows would not permit that, right? I am also interested in an automatic cover pump as I have been using a commercial submersible pump in the past and like the automation idea.