Ok, I have been wondering why I cant get a clean reading for NH3/4 on when I do a WC. I circulated fesh water dechlorinated with prime in my rubbermaid 45g trash can (used only for WC's) after 24 hrs the water showed NO ammonia. I mixed in the propper ammt of salt mix and 30 min later I tested the same water and got a 1ppm ammonia reading with an API and Tetra liquid test kit. This happens both with Instant Ocean and Coralife Salt mix. Any reason why this could be happening?