Help! My fish are all dying!

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?
 
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?

Yep. Static voltage is just that--it doesn't go anywhere. Give it a means to move and create current, then you have a problem. Even then, you should do what you can to minimize voltage. As I said, you'll always have a tiny bit, but you should make sure that is the most you'll get by seeing if any particular piece of equipment is causing an issue--usually heaters, but also pumps are typical culprits.
 
I personally don't recommend them, no. Lots of people use them, but the physics behind it tells me it isn't the best idea.
 
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