Thanks Janet. I am not listening to the pool store just getting my test there. I have only ever added what people here tell me too. I am in Canada and a Taylor kit cost alot here. So as I am new to pools I get the water test done at pool store. What a bout the Muratic should I add? I do loose chlorine during the day that is why I have started to get CYA in there as I was told by my installer the SWCG would look after everything! Which it has I have never had anything but clear water but I have the SWCG running at a hight level to do so and I don"t want to kill it.