No, it should turn pink if there is chlorine in the water, in my experience even when the level is low. Do you have the small Taylor K-1000 OTO tester? The one where you put 5 drops of the yellow reagent in? That one is a good test to determine the presence of chlorine even if other wise you're not getting a reading.
I'm not sure about the second scenario....but know that once a normal test water is clear after testing for CC's that if left alone it will return to pink. That is normal and means nothing. But if the water is zero to begin with..... I dunno!? Let me ask around...
I'm not sure about the second scenario....but know that once a normal test water is clear after testing for CC's that if left alone it will return to pink. That is normal and means nothing. But if the water is zero to begin with..... I dunno!? Let me ask around...