It's done! With the help & guidance of AnnaK, this newbie's pool is clear & sparkling!!!! The pool started out with green water and an owner that was clueless about everything! Now, the chemistry values are where they should be, & I have a firm grasp on the maintenance & upkeep. I still have lots to learn, but I'm well on my way to a trouble-free pool for the summer. Now all that's left to do is wait for the water to warm up.