500W: 64.7 ~ 105.6 gal (245L~400L). 300W: 39.6 ~ 66 gal (150L~250L). 150W: 10.5 ~ 26.4 gal (40L~100L). I'm sure you're all aware that the temperature changes throughout different seasons. The perfect aquarium heater will make sure your fish are always happy and healthy.
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