I needed CYA and I couldn't find it at my usual places so we went to Leslie's. When we walked in a man asked what we needed and I said CYA. He said, why? Most people try to avoid it. I had 2 men staring at me like I was crazy. I said we have a SWG. Then they seemed OK with it. I thought it was funny that it never crossed their minds that I don't use pucks. I then got schooled on how I need to be careful adding it and I better know how much I needed to add. My husband chimed in and said, she knows exactly what she's doing and it's all high tech and precise. Then they quit questioning me about it. I think I prefer Home Depot and Lowe's where I can just get what I need without any questions.