In-Line Heater 300W

The In-Line Heater 300W is the higher-wattage variant for large aquariums running high-flow canister filtration. Installing on the pressurised return hose, it heats flowing water continuously and efficiently, delivering consistently warm water uniformly to the tank without any visible equipment inside.

The digital controller integrates a flow sensor that detects inadequate flow and cuts power to the element automatically, preventing dangerously high temperatures if the canister filter is stopped mid-operation. Temperature setpoint and current reading are shown on a clear LCD.

Compatible with most 16/22mm tubing systems, the 300W output suits tanks between 200 and 300 litres in standard room conditions. An excellent match for large planted aquariums, discus tanks, and African cichlid setups with external filtration.