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I would not try to heat a tank any larger than 8 gallons with a small 50 watt heater. The difference in price between a 50 watt and a much more usful 150 watt heater is not much. I'd check things out before I got a very small heater that may have to work very hard to do its job.

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14y ago
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14y ago

Something insignificant with a good heater.

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Q: How many gallons can a 50 watt heater heat up in a freshwater tropical fish tank?
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