When i got home yesterday from work i noticed the pump in my 210 g sw was not running properly and it was makin a noise so i stuck my hand in the sump to try and clean the intake and i got shocked! So i decided to unplug it and i got shocked again only much worse? eventually pulled breaker but wat the heck is up with this i let it cool down and i cleaned it out and since my lf is closed till thurs i put it bak in and its is running fine rite now but wat could have caused this and will it hurt the fish wen i put it bak on it didnt shock me but i was nervous so i tested the electrical current in the tank and it was at zero so will it hurt my fish or has it already wat should i do if it does it agian before tomorrow night help! I bought a used chiller two weeks ago would dat do any thing to the water ?