Well that's all very interesting....but...you said nothing about using the Tornado or what YOU use to clean off the sensors in YOUR tank. I understand that those sensors are not calibrated to the smallest degree or are they suited for scientific observation. HEY...this aint chemistry class here....I just wanted to know what people out here use to clean there contacts. I mean, after you empty your holding tank, all the indicator lights on the test panel should NOT be on....RIGHT?
