Glad to hear that everything looks like it should recover. On another more serious note, get your GFI installed now. If you had been reaching into the tank when that fan fell it might have been a different story.
People don't realize that when you get electrocuted your muscles contract and it is impossible to let go of the energized object. This means that if your arm is in your tank you won't be able to push away.
Just a thought.
