Took water sample to 2 different pool stores today and got different results except for both agree no free chlorine in pool. Dumped 400 oz of bleach in pool last night and still no free chlorine!!! Both pool stores said I must shock the pool or it will continue to be cloudy. Bought $25 bucks of biogard smart shock but have not added it because it says to shock pool in the evening. I guess I will try this since adding our bleach is not working!!!