I recently bought a 150 gpd 5 stage ro/di unit from fb marketplace and i finally got around to setting ut up. I started from scratch. I bought new hoses to b color coordinated and i got it up and running today. The inline tds meter is reading 009 and i have a hand help pen style tds meter that i put in my 50 gallon storage can and that is reading 000. Wich one should i go off?