I feel like a dummy but I had my hood displaced today as I was messing with a tumbler and some how I knocked the whole hood, light, and air pump in to the tank! I almost dirtied my undies. In a panic I pulled everything out by the cords expecting to die. Strangely everything continued to function (other than the air pump was blowing water out of it) and I didn't get any shock, nor did I find any fish floating thank goodness. Certainly water and electrical are a pretty scary mixture.