Heater Calculator
Find the ideal heater wattage to keep your aquarium at the correct temperature.
Result
Wattage needed --
Recommendation
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Reference table
| Volume | 5°C diff | 10°C diff | 15°C diff |
|---|---|---|---|
| 50L | 25W | 50W | 75W |
| 100L | 50W | 100W | 150W |
| 200L | 100W | 200W | 300W |
| 400L | 200W | 400W | 600W |
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Frequently Asked Questions
How many watts per liter do I need?
The general rule is 1-1.5W per liter for differences up to 10°C. For larger differences or cold environments, use 2W per liter.
Should I use one or two heaters?
For tanks over 200L, two heaters are recommended for redundancy. If one fails, the other maintains the temperature.
What is the ideal temperature for a reef tank?
Between 25-27°C is ideal for most corals and marine fish. Avoid variations greater than 1°C per day.
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