Thanks for the warm welcome Janet........ I did as Watermom suggested and added a cup of acid and some more chlorine this evening. I've got the chlorine over 3 ppm (that was as high as the cheap test kit I had went, though I could tell by color it was slightly higher) and ph came down to 7.2! CYA dissolved nicely in the skimmer. So, looks as though I'm on the right track. I'll keep checking morning and evening and adding chlorine as needed...... Two questions; 1. When is it safe to get in the pool? It does have a vinyl liner and the installation guy had said "not to go in for a couple of days as I may put footprints underneath the liner in the newly tamped sand." I don't mind doing things right, though I would think with the weight of 10,000 gallons of water that the sand won't be going anywhere. Anyone know if there is any truth to his advice? 2. I was looking into chlorine tablets for ease. Everything I looked at had a certain level of hypochlorite (say 49%-89%) and "other ingredients". Most products were HTH brand. Is that a good way to maintain chlorine levels? And if so, what should I look for in tabs? The pool came with a full bucket of HTH dual action tabs. When I looked at ingredients I saw Copper Sulfate and decided to heed advice and not use them as I have read copper is bad for you pool. Thanks again , Andy