02-23-2007, 11:01 AM
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I use 2 smaller heaters in my 55 gallon tank. I've found that it helps keep the temperature more stable throughout the tank. My tank is 4 ft long, so if there were only 1 heater, I'm thinking the water surrounding the heater would be at a higher temperature than the water on the far end. Maybe if you put the heater in the middle... but I like them on the sides, more out of the way. It just seems that with a larger tank, it'd be easier to keep a stable temperature with 2 smaller heaters.