Cleaning this 60 ounce nylon today and thought I would do some ph testing. Not heavily soiled, I'm really there to do some spot removal. Carpets were cleaned by me 6 months ago. Presprayed with code Red (12ph aprox). Rinsed with procyon plus powder (10ph aprox). First pic is the ph immediately after prespraying, second is 10 minutes after rinsing.