i just had a thought, random i suppose but anyway, i was wondering how many people actually turn off all electrical equipment before doing a water change or putting there hands in tank. I always see that warning in heater manuals or even filter manuals to turn off Everything so you dont get shocked or killed. personally, ive never done that, i keep my filters running as long as i can during a water change, and even my heaters most of the time i dont turn them off ( i do keep them in the water). Just wondering, i see it all over, but have a hard time thinking most people actually do this