Our well water has always had a extremely low ph reading. ( I kept the chlorine tabs and baking soda tabs in it last year.) Hubs works at a chemical plant and he has taken samples of the water . NONE for my pool, by the way. I will get on of the ones recommended on the pool school. It really does look much better. I don't know if it is the liquid chlorine or having a more powerful pump and a better skimmer. Neither one hurts though. Thanks for the advice.