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I have a tronic 200 watt heater in a 58 gallon tank. It is 6 months
old. It used to hold a temperature steady all through the winter,
but in the past month I have noticed a decrease in performance. The
heater is set at 77 degrees, but the thermometer reads 74 degrees.
However, I also stopped heating the room as spring has arrived and
the room is actually a little cooler (67-68 degrees) than I keep it
in the winter. The few days that the outside temp rose over 80, the
tank water went back up to 77 -79 degrees base on the warmth of the
room. My questions: do I need a second heater? Does this heater sound
defective? Is it typical that big fluctuations in room temp would
so severly affect water temp? Any veteran advice would be appreciated.