In the 50s when I started this hobby and even in the 60s and maybe 70s, there was no GFIs so yes, we did unplug everything before we stuck our hands in the tank. We learned fast why we had to do that as all tank pumps were made of iron and salt creep covered everything from our air stones.Does anyone here disconnect all power before placing hands in tank, does anyone here test for amperage before sticking hands in sump. Or does everyone here believe in my equipment will never go bad?
(there were no powerheads)
They were not required everywhere when I worked as an electrician in Manhattan but I retired almost 20 years ago so I don't know if they are required now. My brand new house had them all over the place but I threw most of them out because in some locations, they are just a pain and stupid. (and $80.00)