I have a couple of new developments. I plan to move my tank to another spot in my classroom to take advantage of more outlets. I'm also going to replace my filter and heater with an all in one unit. Anyone know about the Eheim Pro Thermofilter? I found the 3 prong heater right here at Saltwaterfish.com. They also have a grounding probe that our maintenance guy says we should try. Modifying the plugs won't work because they are using some ultra sensitive device to measure the stray voltage. I really can't try to get around OSHA. It would cost the school way too much in fines if I'm wrong. I really appreciate all the great responses. I will keep you all posted.