Is one heater enough for bigger tanks?

For many tanks above 180L, two smaller heaters can improve redundancy and heat distribution.

How accurate are built-in heater dials?

Treat dial values as a starting point. Fine tune using measured water temperature over several days.

Quick answer: Most 60-120L tropical tanks do best with a quality 100-150W adjustable heater plus a separate thermometer for verification.

Reliable heater picks by wattage range, thermostat stability, and safety features for tropical setups.

Best Aquarium Heaters in Australia (2026) comparison table
Heater Range	Tank Fit	Stability	Safety	Quick Link
50-75W	20-60L tanks	Moderate	Basic cutoff	Check 50-75W options
100-150W	60-120L tanks	High	Guard + dry run protection	Check 100-150W options
200-300W	120-250L tanks	High	Overheat + shatter protection	Check 200-300W options

Match heater wattage to real room conditions, not only tank size. Cooler rooms or open-top tanks often need more headroom.

Place the heater in good flow, let it acclimate before powering on, and always verify with an independent thermometer.

Is one heater enough for bigger tanks?: For many tanks above 180L, two smaller heaters can improve redundancy and heat distribution.
How accurate are built-in heater dials?: Treat dial values as a starting point. Fine tune using measured water temperature over several days.