This morning I had to go get an adapter for a different faucet so unhooked it while I ran to lowes. Took the pH just as I started it up and it was coming out 6.4. Used it to fill a 5 gallon bucket and the ph is back up to 9. Figured it may be the bucket so filler another small plastic cup(same way I checked it when I started it up), and the pH of the water coming out was 10.0. Seems like the longer I run it the higher the pH gets. Any ideas what might be causing this? Going to contact the manufacturer and the store I bought it from to try and get a replacement.

System is a Hydrologic StealthR0100