Serious dangers of salt water tanks and any tank

[reefermadness]

I was about to start correcting people but outtacontrol is doing a good job.

Just recently I had a MJ powerhead short.....the cord had cracked under the water (saltwater hardens the soft insulation of cords and the vibration of the powerhead can cause cracks). When I stuck my hand in the tank I got a nice zap but the gfi tripped......safety device indeed. The reason it did not trip till I stuck my hand in is I dont have a grounding probe so there was no good path to ground for the current to flow.