Aquarium Fish Tank Heaters

Aquarium Fish Tank Heaters

Shop fish tank heaters and aquarium heaters at Finest Filters. We stock heaters for fish tanks in a variety of sizes, both internal and external aquarium heaters, and a wide range of models from leading brands. Browse our full collection today.

A fish tank heater is an essential piece of aquarium equipment to help you make sure the water in your tank is the optimal temperature for your fish or any other wildlife living in it. Many aquarium heaters are designed to sit in the tank itself, but you can also get external heaters that can attach to your tank from the outside. The best aquarium heater for you will depend on the size of your tank and how much other equipment is in there - alongside a fish tank heater, you’ll also need a pump and a filter as a minimum. 

If you’re looking for a small fish tank heater, we have 25w aquarium heaters from Hepo and Hidom, which are both high-quality, trusted brands. These smaller models are suitable for tanks of up to 25 litres in size. However, if you’re looking for a larger aquarium heater, we stock models up to 500w for tanks of up to 500 litres. From heaters for freshwater aquariums to tropical fish tank heaters, there really is something for everyone at Finest Filters. 

Discover the Hepo M7 Infrared Aquarium Heater range, check out the various Ista External Aquarium Heaters, or find the Hidom fish tank heater that’s right for you.

We also stock a selection of fish tank heater accessories, including suction cups and brackets to fix your aquarium heater in place. Shop the full Finest Filters collection of aquarium equipment or contact us if you have a question about any of our products.

Items 1-20 of 33

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  1. Hepo Aquarium Fish Tank Heater Double Tube 25w to 600w
    Hepo Aquarium Fish Tank Heater Double Tube 25w to 600w
    As low as £18.99

    The Hepo Q6 range of aquarium heaters are developed with a double heating tube for optimum reliability and performance. These heaters are available in a range of sizes from 25w to 600w. Please select the size required from the drop-down menu when ordering.

    These quality heaters are easy to adjust and will regulate the temperature in your aquarium. It is recommended to use your heater alongside a stick-on thermometer to ensure the tank temperature is correct.

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  2. Hepo M7 Infrared Aquarium Heater Range (25w - 600w)
    Hepo M7 Infrared Aquarium Heater Range (25w - 600w)
    Rating:
    94 % of 100
    As low as £29.99

    The Hepo M7 range of infrared aquarium heaters are suitable for aquariums from 25 to 600 litres in size. Infrared style heaters are typically more energy efficient and reliable than standard glass or metal heaters, and heat aquariums quicker and maintain a more stable temperature.

    The M7 series heaters are available in a choice of 10 sizes to suit a range of aquariums (25w, 50w, 75w, 100w, 150w, 200w, 250w, 300w, 500w and 600w)

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  3. Hepo HP-605 Submersible Aquarium Heaters
    Hepo HP-605 Submersible Aquarium Heaters
    As low as £9.99

    The Hepo HP-605 series heaters are easy to set and highly accurate. Made from strong glass to ensure optimum power output while also being secure.

    Available in 25w, 50w, 75w, 100w, 150w, 200w and 300w sizes.

    These heaters are easy to adjust, and will regulate the temperature in your aquarium. It is recommended to use your heater alongside a stick on thermometer to ensure the tank temperature is correct.

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  4. Hepo HP-608 Submersible Quartz Aquarium Heaters
    Hepo HP-608 Submersible Quartz Aquarium Heaters
    As low as £10.99

    Ideal for aquariums up to 25 - 300 litres, these high-quality quartz glass heaters can be used in both freshwater and marine aquariums alike. The temperature can easily be regulated on the top of the heater, and the desired temperature is shown on the front of the heater.

    The Hepo heater range comes supplied with a 3 Pin Standard UK plug, and a 1.5 metre cable.

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  5. Ista External Aquarium Heaters
    Ista External Aquarium Heaters
    As low as £45.99

    The Ista External Heaters are the ideal solution to heat your tropical aquarium without having to have an unsightly heater in on display in the aquarium.

    The External Heater fit’s inline with your return pipe from an external filter and heats the water as it passes through the thermal spraying glass structure of the unit. The thermal spraying Glass also speed up the heating process making the heaters extremely efficient at heating your aquarium.

    Two temperature sensors continuously monitor and display the temperature on the 2-line digital display and adjust the heat produced accordingly. The 2-line display shows both the set temperature and the real-time water temperature.

    Available in: 150w, 300w and 500w models.

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  6. Ista Fixed Temperature Nano Heaters
    Ista Fixed Temperature Nano Heaters
    Out of stock

    The Ista Fixed Temperature heaters are compact and durable aquarium heaters for small nano tanks.

    These heaters have three temperature settings: 25°C, 28°C or 33°C. The temperature setting can be changed via an inline switch making it easy to adjust the thermostat.

    The Ista Fixed Temperature heaters are available in two sizes: 5w (for use in aquariums up to 5 litres) and 10w (for aquariums up to 15 litres).

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  7. Precise Comfort for Tropical Tanks: Submersible Preset Aquarium Heater
    Submersible Preset Compact Aquarium Heater
    As low as £11.99

    The preset heater is set to 25 degrees, appropriate for most tropical fish, shrimp and aquatic plants. Specially designed for simplicity and efficiency, this heater ensures that your aquatic companions thrive in the ideal temperature range.

    Whether you're a seasoned aquarist or a beginner, this preset heater takes the guesswork out of maintaining the perfect tropical climate in your aquarium.

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  8. Hidom 25w Aquarium Heater (HT-2025)
    Hidom 25w Aquarium Heater (HT-2025)
    £9.99

    You are purchasing a high quality 25W Aquarium heater suitable for aquariums up to 25 litres in size (HT-2025)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  9. Hidom 25w ProHeat Quartz Aquarium Heater (HT-8025)
    Hidom 25w ProHeat Quartz Aquarium Heater (HT-8025)
    £10.99

    You are purchasing a high quality quartz 25W Aquarium heater suitable for aquariums up to 25 litres in size (HT-8025)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  10. Hidom 50w Aquarium Heater (HT-2050)
    Hidom 50w Aquarium Heater (HT-2050)
    Rating:
    100 % of 100
    £10.49

    You are purchasing a high quality 50W Aquarium heater suitable for aquariums up to 50 litres in size (HT-2050)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  11. Hidom 50w ProHeat Quartz Aquarium Heater (HT-8050)
    Hidom 50w ProHeat Quartz Aquarium Heater (HT-8050)
    £11.49
    Out of stock

    You are purchasing a high quality quartz 25W Aquarium heater suitable for aquariums up to 50 litres in size (HT-8050)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  12. Hidom 75w Aquarium Heater (HT-2075)
    Hidom 75w Aquarium Heater (HT-2075)
    £10.99

    You are purchasing a high quality 75W Aquarium heater suitable for aquariums up to 75 litres in size (HT-2075)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  13. Hidom 75w ProHeat Quartz Aquarium Heater (HT-8075)
    Hidom 75w ProHeat Quartz Aquarium Heater (HT-8075)
    £11.99

    You are purchasing a high quality quartz 75W Aquarium heater suitable for aquariums up to 75 litres in size (HT-8075)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  14. Hidom 100w Aquarium Heater (HT-2100)
    Hidom 100w Aquarium Heater (HT-2100)
    Rating:
    99 % of 100
    £11.49

    You are purchasing a high quality 100W Aquarium heater suitable for aquariums up to 100 litres in size (HT-2100)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  15. Hidom 100w ProHeat Quartz Aquarium Heater (HT-8100)
    Hidom 100w ProHeat Quartz Aquarium Heater (HT-8100)
    £12.49
    Out of stock

    You are purchasing a high quality quartz 100W Aquarium heater suitable for aquariums up to 100 litres in size (HT-8100)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  16. Hidom 150w Aquarium Heater (HT-2150)
    Hidom 150w Aquarium Heater (HT-2150)
    £11.99

    You are purchasing a high quality 150W Aquarium heater suitable for aquariums up to 150 litres in size (HT-2150)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  17. Hidom 150w ProHeat Quartz Aquarium Heater (HT-8150)
    Hidom 150w ProHeat Quartz Aquarium Heater (HT-8150)
    £12.99

    You are purchasing a high quality quartz 150W Aquarium heater suitable for aquariums up to 150 litres in size (HT-8150)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  18. Hidom 200w Aquarium Heater (HT-2200)
    Hidom 200w Aquarium Heater (HT-2200)
    £12.49

    You are purchasing a high quality 200W Aquarium heater suitable for aquariums up to 200 litres in size (HT-2200)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 16 and 32 degrees centigrade.

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  19. Hidom 200w ProHeat Quartz Aquarium Heater (HT-8200)
    Hidom 200w ProHeat Quartz Aquarium Heater (HT-8200)
    £13.99

    You are purchasing a high quality quartz 200W Aquarium heater suitable for aquariums up to 200 litres in size (HT-8200)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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  20. Hidom 250w ProHeat Quartz Aquarium Heater (HT-8250)
    Hidom 250w ProHeat Quartz Aquarium Heater (HT-8250)
    £14.99

    You are purchasing a high quality quartz 250W Aquarium heater suitable for aquariums up to 250 litres in size (HT-8250)

    Our easy adjustable heaters are completely submersible, and are suitable for both freshwater and marine aquariums. The temperature can easily be regulated between 20 and 32 degrees centigrade.

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