Re: CYA - High Concentration Measurement?
Sounds to me that you are doing the test correctly and have no CYA. When you mix for 30 seconds - mix is shake vigorously. How's your chlorine demand? Did the FC drop to 0 over the winter? There are bacteria that consume CYA and convert it to nitrogen compounds - sometimes it takes the form of ammonia and that requires huge amounts of chlorine to clear.
12'x24' oval 7.7K gal AG vinyl pool; ; Hayward S270T sand filter; Hayward EcoStar SP3400VSP pump; hrs; K-2006; PF:16
Bookmarks