Hey all - I recently got the 250 Watt Stock tank deicer. The instructions mention two things: 1. don't use an extension cord (which I would need to), and 2. Install a ground rod 8 ft deep. Have others done this?? I can't find anything in other articles or posts about this. Temps are already below freezing, so I've been swapping out the water, but want to get this installed asap. Thank you!