I just came across a product at Lowes called "Angry Egg". It was an egg shaped plastic container with large slots that contained what looked like white compressed crystals. The label said it contained Potassium Peroxymonosulfate. It is to be used for clearing up pool water and claims it will clear up a cloudy pool in 12 - 24 hours. I just found an ad on-line here: http://adobe-online-coupons.com/2013/02 ... l-cleaner/ . What do you think, is it any good or is it more snake oil?