Yea theres a problem with green tint in api test kits making it a false positive. Prime or safe are known to cause false ammonia readings. The reason why is a bit of an explanation but in a short explanation prime/safe and just about all water conditioners have the ability to bond to ammonia and nitrite when the dosage is at a high level, the chemicals in the ammonia test kits picks up these premature bonds leading it to think there is ammonia. But your tank is cycled and your fine.
Wrong. Those products don't cause false readings. They show positive for ammonia that was bound but rendered harmless by their product. Prime doesn't make ammonia disappear, it just makes it into something else for a day that won't hurt the fish. If your bio filter doesn't eat that in a day it becomes straight ammonia again.
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