I picked up a brand new Rena Smart Heater 300W from my LFS about a month ago and I just realized that it has been sending electrical current through my tank. I noticed it a number of times before but it was only yesterday that I deduced that it was my heater. Has anyone else ever experienced this problem with this product? None of my livestock was harmed but whenever it was on and I put my hand in my tank it was like sticking my had in a socket! Needless to say my wife went nuts when I told her!