Good Morning to all and Happy Fathers Day to all the Dad's! I am new here and just wanted to say Hello. I just opened my pool last Sunday to find a green pond tadpoles and all. After a week of cleaning it up I am now in the process of draining half and refilling due to too much CYA. Your forums have been a great help as I would have never known you could have too much CYA and get a false reading if I hadn't been lurking on this site. So thank you !