I haven't done any treatment or filtering to the water in my Sylvan-brand (concrete) pool since early August, and it's time to close it for the season. The water is near-black and the pool is filled with leaves from our heavily-treed yard. We already know we don't plan to use the pool at all in 2013 and we may or may not use the pool in 2014. What I would like to do is, drain the pool completely and get all the debris out. I've read that in certain kinds of pools (concrete or fiberglass) you can't drain them without first setting up some heavy-duty wooden bracing, because the whole pool, if emptied, can tend to bulge, crack, or rise up out of the ground.
This is not a new pool -- it's at least 20 years old.
My questions are:
1) Am I ok to just drain the pool empty wihtout installing any temporary support bracing, and walk into the pool and remove the leaves and debris? - and -
2) If I drain the pool, blow out the lines, install gizmos, etc., can I just leave the pool empty (but covered with a spring-loaded safety cover) for the winter?