Well go to Wal-Mart. I know you got a Wal-Mart, and they should have a pH meter in their gardening section. Or if not that go to Home Depot. I'm not for sure about yours but mines has a gardening section. Havent really went in there because lately I havent been there and when I was there I wasnt interesting in marijuana (wow lol). So you can tell how long it's been since I've been to Home Depot but I really believe they would have it in their gardening place.