Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not what I expected

I purchased the Camco tastpure water filter to filter the water that I use to wash my cars at home. While this was not the intended use by the manufacturer, I felt that filtered water was filtered water. At my house I have "hard water" outside and wanted this filter to clear the water while washing the car. It didn't work as well as I had intended.