I live in North Carolina and currently own a 10 foot by 30 inch above ground vinyl Intex pool. Not much, but good enough for now. I tried to do everything right so I went to the pool supply store right up the street from my house. I brought a water sample with me, which they tested. They then proceeded to sell me $157.00 worth of chemicals for my small pool. I told them I had to check with my husband, but never went back. I only spent $80.00 on the pool itself! So here I am trying to educate myself. I am currently trying to raise the PH levels in my pool. I purchased some "Dupont PH Increaser for Spas". Even though it's marketed for spas, would I still be able to use it in my vinyl pool? Any information would be great! Thanks everyone!