Could I have missed a nitrite spike over two days? When I tested my water today I had ammonia of .5, and nitrAtes of 5ppm -- nitrites of 0. I last tested my water on Saturday - both tests with the AquaPharmaceuticals test kit. Saturday - 0 nitrities, today 0 nitrites. I went ahead and dropped the amount of ammonia I am feeding the tank down, and will keep testing it. But this seems weird to me.