Pets
What Size Aquarium Heater Do You Need?
Calculate the right heater wattage for your fish tank based on volume and room temperature.
In this article
India
Most of India: heater unnecessary! North India winter only (Nov-Feb)। Delhi/UP: 100W per 100L for tropical fish। South India: almost never needed। Summer: COOLING is the real problem — fan across surface।
Safety
Heater malfunction = #1 technical fish death cause। External controller recommended (₹500-1,500)।
⚡ 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
India में ज़रूरी?▾
North winter only। South: almost never। Summer: cooling needed instead।
Safety?▾
External temperature controller (₹500-1,500) as backup।
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