Ok, I did a water change and brought the salinity up last night. I got my skimmer running and will leave it which should help with the ventilation and any buildup. I am working on a voltmeter, but I am not clear on the whole current issue. My LFS says a grounding probe is "essential for any aquarium setup...." I know, LFS are not always (read rarely) reliable... but it seems to me that removing the voltage from the water would be a good thing. So "Internet Ninja"... I am the grasshopper who knows he knows nothing. Teach me. The voltage is not harmful to the fish until it becomes current?