Bests & Worsts Reviews from Amazon

I got this after seeing good reviews so I might have gotten a bad on shipped but this really scared me. I got it an hour ago and put it in my tank and everything seemed fine. I plugged it in and my fish started going nuts. I looked at the heater and bubbles were coming from the electrical cord top, condensation immediately started to fill the tube and it looked like a vapor was in the water which is something I have never seen in all my years of fish keeping. I unplugged it right away and removed it. 15 min later and the tube is still warm to the touch! I really hope my fish all make it because I think they might have been getting electrocuted. I will be going to an aquatic store to buy a new one.