TMC Therm Heater

What It Is

The TMC Therm Heater range is a collection of fully submersible aquarium heaters designed to maintain a stable water temperature in marine and freshwater aquariums. Available in 50W, 100W, 200W and 300W models, each heater features an adjustable thermostat and durable construction to provide reliable, consistent heating.

Why We Like It

Temperature stability is one of the foundations of a healthy aquarium. A reliable heater helps prevent unnecessary stress on fish, corals and invertebrates, particularly during colder months or overnight temperature drops.

The Therm range makes it easy to choose the correct heater for your aquarium, while the adjustable thermostat allows you to fine-tune the temperature to suit your livestock. If your aquarium is in a particularly cold room, or you're heating a large volume of water, it's often worth choosing the next size up or using two heaters for improved heat distribution and added peace of mind.

Choosing the Right Size

50W Heater

• Recommended for aquariums up to 50 litres*
• Ideal for nano reefs, quarantine tanks and smaller tropical aquariums

100W Heater

• Recommended for aquariums up to 100 litres*
• Ideal for many all-in-one aquariums and medium nano reefs

200W Heater

• Recommended for aquariums up to 200 litres*
• Suitable for medium-sized marine and freshwater aquariums

300W Heater

• Recommended for aquariums up to 400 litres*
• Ideal for larger display aquariums and sump systems

Key Details

• Available in 50W, 100W, 200W and 300W models
• Fully submersible design
• Adjustable thermostat
• Maintains a stable aquarium temperature
• Suitable for marine and freshwater aquariums
• Simple to install and operate
• Reliable everyday heating solution

*Recommendations assume a typical heated indoor environment. Very cold rooms or unheated spaces may require a larger heater or the use of two heaters for optimal performance.