Want to thank all of you for offering help! I have been adding Borax to try and increase pH. No change yet. Exactly how much should I be adding? My pool is 5,000 gallons 16'X48", afraid I may add too much! I looked at the calculator and still was unsure, it said add 0.1 oz by wt? Sorry, not to good with understanding measurements. ALso my water has now turned back to the dark muggy brown that it started out as! I mean you can not see the sides or bottom of the pool. DO you think Im going to fight this all summer? Im considering tying in to rural water at the highway and just draining the pool and refilling it, heck Im going to be out probably more fighting this well water, you think? I look at it and just want to cry! what would you suggest, if you think I can fix it, I will continue.... Just dont want to be out a fortune and have to fight it all summer. Feeling hopeless! Again, thank you for the help.