I don't know this one. Haven't seen this question before. It seems like ammonia shouldn't be floating around the tank. Try using pump speed divided by tank size - in minutes. That's once around the tank. I'd like to see, just out of curiosity, what 1 minute tests at.
Since you were wondering, I considered doing a Google search on this but ended up using TPT's search.
My main question is if i am dosing 4 drops of ammonia daily... after how many hours should I test it and confirm its at 0 ?