Skip to content
CalcWolf › Pets › Calculadora de Aquecedor de Aquário
Pets

What Size Aquarium Heater Do You Need?

Calculate the right heater wattage for your fish tank based on volume and room temperature.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

Regra

1W/L se diferença < 5°C. 1,5W/L para 5-8°C. 2W/L para > 8°C. No Brasil, muitas regiões não precisam de aquecedor no verão. No inverno do Sul/Sudeste: essencial para tropicais. Aquário de 200L em Curitiba no inverno (ambiente 12°C, objetivo 26°C): 200 × 2 = 400W.

Segurança

Aquecedor travado em "ligado" = morte dos peixes. Use termostato externo como segurança (R$30-60).

⚡ CalcWolf Insight

A sudden temperature drop of 5°F+ can trigger Ich (white spot disease) in tropical fish — the most common aquarium disease. A reliable heater with a temperature controller is cheaper ($40-60 total) than treating a tank full of sick fish ($20-40 in medication plus potential fish losses). Prevention is always cheaper than cure in fishkeeping.

Frequently asked questions
Preciso de aquecedor no Brasil?▾
Nordeste/Norte: raramente. Sul/Sudeste no inverno: sim para tropicais.
Quantos watts?▾
Depende da diferença com ambiente. SP inverno (15°C→26°C): 1,5W/L. Curitiba inverno (12°C→26°C): 2W/L.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
🐛 Report a Calculator Error
Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.