Mine burned the suction cups on it off. It broke sevrel important parts. It is it to like 72 degrees and it is a bout 80 degrees I had to buy a other heater. I was going to buy a cheapo heater. but my dad said that it could hurt my fish. He said that it would break easily too. So i borrowed some money and bought a 300 Wat fluvel heater. the tank is 75 gallons. no fish got hurt. just my heater.