03-08-2012, 12:18 PM
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This was due to a faulty heater, presumably? I have three times had heaters fail, once raising the temp with dead fish resulting. This is why I now always recommend multiple heayters in tanks over 50g (two heaters work less hard than one has to), plus getting the very best. My heaters that failed were the less expensive 50w ones. The higher wattage heaters also have a better record of lasting.
Another good idea is to keep the room warm. I have a fish room, with an electric heating unit rather than being connected to the house furnace. In the winter I keep the room at 70-72F day and night. This means the tank heaters don't have to work as hard or as long to keep the tanks at 75-78F. Many heaters will not accurately maintain the temp if there is a difference of more than 10 degrees between the ambient room temp and the set temp of the tanks.
Last edited by Byron; 03-08-2012 at 12:23 PM..