I'm on my third season as a pool owner and have only been to the pool store twice -- once out of town to buy pool parts and once last year to a small store in town for testing supplies (bought a Taylor kit online the first year). The people at the local pool store don't know me and wouldn't have a need to know me since we purchased the pool used, put it up ourselves and I use BBB. I went straight for the Taylor supplies and picked up what I needed, four different bottles. The store owner asked who I was buying for and I replied, "Myself." He said, "No, I mean what business." Again, I told him they were for me and my backyard pool. He didn't even know how much to charge me as the billing for businesses is done by the "bookkeeping employee." All he, or other front counter staff, ever had to do was write it up. They didn't have to know how much to charge for bottles. He said most residential users just use the strips. I said, "I know," and smiled. I was waiting for him to ask me what I used for sanitation but I was disappointed. He did not. Maybe he knew already.
Anyway, thanks to this board, I am practically a stranger to the local pool store.