Aquarium heaters and pumps together draw 100–500 watts depending on tank size and type. Freshwater aquariums with simple filtration use less; saltwater systems with advanced equipment use substantially more.
| Basis | Cost |
|---|---|
| Per hour (while running, 100 W typical) | $0.019 |
| Per day (24 h/day, 7/7 days) | $0.45 |
| Per month | $13.76 |
| Per year | $165.06 |
| Hourly range (small 50 W – large 200 W) | $0.009 – $0.038 |
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