Hydor Inline Heater 300W

The Hydor Inline Heater 300W provides high-capacity external heating for larger aquariums, connecting seamlessly in-line with 16/22mm canister filter return hoses. By mounting outside the display tank, it removes all visible heater equipment from the aquascape, supporting minimalist and high-end aquarium aesthetics. Water is heated as it flows through the unit from the external filter, distributing warmth evenly through the tank's circulation. The adjustable thermostat covers the standard tropical temperature range, and the inline design leverages existing filter flow for energy-efficient heating. Ideal for large planted tanks, marine displays, and any setup where in-tank equipment is undesirable.