I am beginning to understand the basics ... Many Thanks to all of you and this site for its multitude of information. I live in the country with fields around and a pond not to far. I suffered a pretty bad frog attack earlier and had some troubles with algae. My mistake was not finding all of you and going to the pool store and almost paying for my pool again in chemicals with little results. I feel I have begun to get a handle on the algae but my alkalinity is 180 my ph is 7.4 and my pool is cloudy so much so I cant see the bottom. I do have low calcium 100. Can calcium levels cause cloudiness? 28 foot pool Sand filter. Be gentle on me this is my first post...