One thing I hate about this hobby is getting shocked when something shorts out. Today, my heater shorted out and was putting ~70-80 volts in the tank. How bad is that? I unplugged the heater and it appears I average about 4-5 volts in the sump and tank. I have 110g reef setup. I have not isolated where the 4-5 volts is coming from.
Should I worry about 4-5 volts? I tested the water with my volt meter