False positive on ammonia tests?
I'll start off by saying that this API test kit is not expired (manufactured 2008, expires 2017) and has been working well up to last week.
Whenever I test my water I get a deep green on the ammonia test, the highest possible on the scale. I do use Prime and a nitrospira bacterial supplement. There are no nitrites or nitrates in the tank.
Am I looking at lots and lots of ammonium? I did a 30% WC yesterday after seeing this result and retesting today is showing the same result.
Ammonia: 8+ (?)
Temp: 75 degrees
CO2 - yes, moderate
Livestock - no signs of distress
Plants - not growing