Thanks for everyone's replies and suggestions. I have a Sand filter,
but did check for holes and leaks, didn't find any.
Regardless, I was able to fix the problem, although it was through dumb
luck... I read up on the subject in a number of websites and older ng
threads, among the solutions/causes, it seemed water imbalance was
always the #1 reason, so I just took a chance and dumped about 800
grams of pH - in the pool, even if the solution test and the store said
my pH was fine. Well, whatever it was, it went away and the pool
cleared up crystal clear within 4 hours and has pretty much stayed that
way since. I'm no longer thinking of dumping cement in it. <g>
It's pretty pool closing time now here, so I was just trying to
maintain it because I heard from a few sources that if you can maintain
it before closing it, it will be less of a bitch to open next year.
And since we're on the subject... the previous owner of the house/pool
said he never put a cover/mesh on the pool for the winter. He just
made sure the pick up the leaves/debris before it froze, then left it
like that. Is that a good idea? I mean, do you think he did that
strictly for an economical reason (which I don't see why since a mesh
for my pool size would "only" be about $100) or was there another
reason to avoid covering the pool in winter? I live in the great white
north (Canada), so we get a ton of snow.