just wondering if anyone has had problems with this heater. I looked at my 350 litre brackish tank this morning to find my columbian cat shark looking lifeless at the bottom then realised the temp had fallen from 28c to 14 the light on the heater was on to indicate normal temp, rushed around and found a spare glass heater. Then i went to my lfs as i had only bought it 6 months ago, only to be told they have stoped making them due to problems, managed to get a 200watt in exchange and got a 100watt for 2/3s off because of price difference. All starting to return to normal with water changes to bring temp up slowly. Is this a problem anyone else has had with rena heaters????