Best Aquarium Heaters Deals Online in the UK (25 Deals Found)

Last Updated - 14/12/2025 Sort By:

Best Choice
HITOP

New
HITOP HP-608 Submersible Aquarium Heater 25W 50W With Thermometer and Extra Sucker Cup (50W)
🐟 Thickened Glass: 2mm thickened quartz glass, 33% thicker than 1.5mm normal aquarium heaters, much safer for human and

£12.97
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Neulriscn

New
Neulriscn Aquarium Heater, 500W Fish Tank Heater with External Temperature Controller, Submersible Fish Tank Heaters wit
【500W Aquarium Heater】The 500W fish tank heater can be applicable to 300-450L tank. It is 11.02 inches in length, 4.92ft

£20.99
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New
Hidom ProHeat Quartz Aquarium Heater Submersible Fish Tank Thermostat 25 to 500w
The Hidom ProHeat HT-8 Series Quartz Glass Aquarium Heater has been designed and manufactured by industry veterans and w

£11.45
PYPABL

New
PYPABL 25W 50W 100W 200W 300W Aquarium Heater, Submersible Glass Heater for 10L-300Litres Fish and Turtle Tank (25W for
【Specification】25W water heater, 20*2.5*2.5 cm, suitable for 10L-30L tank, also suitable for freshwater and saltwater.

£11.97
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New
Hepo Submersible Aquarium Fish Tank Tropical Heater Thermostat HP-605 25 to 300w
These quality heaters are easy to adjust, and will regulate the temperature in your aquarium. HP-605 (300w). Ideal for T

£13.49
Best Value
HITOP

New
HITOP HP-608 Submersible Aquarium Heater 25W 50W With Thermometer and Extra Sucker Cup
HITOP aquarium heater 25W, length 18cm, power cord 1.8m, designed for small fish tanks, recommended for aquariums 8-30L.

£11.97
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Interpet

New
Interpet Deltatherm Aquarium Fish Tank Heater, adjustable, for Tropical and Marine, 300 W, for aquariums up to 270 litre
Precise and reliable heating control for tropical aquariums, freshwater and marine

£19.99
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New
Aquarium Heater Submersible Preset Heater For Tropical Aquariums Compact Heater
The preset heater is set to 25 degrees, appropriate for most tropical fish, shrimp and aquatic plants. Whether you're a

£11.99
FEDOUR

New
FEDOUR 200W 400W Aquarium PTC Heater with Controller: Digital Heater for Fish Tank and Turtle Tank 100-400L, Submersible
🐬FEDOUR 200W Aquarium PTC Heater with Controller, simple design, space-saving, suitable for 100-200L fish tanks and tur

£24.97 £25.97
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New
Hidom Submersible Tropical Fish Tank Aquarium Heater & Thermostat (7 Sizes)
These quality heaters are easy to adjust, and will regulate the temperature in your aquarium. Ideal for Tropical / Marin

£11.95
Fluval

New
Fluval T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal.
300-Watt heater designed for freshwater aquariums up to 80 Gal (300 L) with advanced electronic construction provides su

£25.59 £26.99
HITOP

New
HITOP HP-608 100W Submersible and Adjustable Aquarium Heater With Thermometer and Suction Cups
Thickened Glass: 2mm thickened quartz glass, 33% thicker than 1.5mm normal aquarium heaters, much safer for your lovely

£14.97
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New
50W-200W Aquarium Water Heater LED Digital Submersible Fish Tank Thermostat Rod
1 x Aquarium Heater. 🐠Durable & Safe Construction: Made with 30% thicker explosion-proof quartz glass to prevent leaks

£13.42
Interpet

New
Interpet Deltatherm Aquarium Fish Tank Heater, adjustable, for Tropical and Marine, 200 W, for aquariums up to 180 litre
Precise and reliable heating control for tropical aquariums, freshwater and marine

£19.99 £27.99
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New
Fish R Fun Heater Thermostat Submersible Tropical Aquarium Fish Tank
Ensure your aquatic friends stay happy and healthy with the Fish R Fun Aquarium Heater. Always unplug all appliances in

£9.45
Hidom

New
Hidom 25w Submersible Aquarium Fish Tank Shockproof Thermostat Heater with Adjustable Temperature - Suitable for Fish, S
Hidom Aquarium Heaters offer high performance aquarium heating for a range of tank sizes, The HT-2025 25w fish heater is

£9.95
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New
Submersible IP68 Aquarium Fish Tank Heater 25-200w Thermostat - Shockproof
If you keep your aquarium the correct temperature your fish can live longer, however making significant changes to your

£8.00
New
Fluval T Aquarium Heater Electronic Accurate 50 - 300L Submersible Fish Tank
Suitable for Aquariums Up to: 300L. Available in five sizes, these heaters cater to a wide range of aquarium capacities,

£26.99
New
50W–500W Submersible Aquarium Heater With Adjustable Thermostat, Stainless Steel
50W, 100W, 200W, 300W, 500W power. The heater is made of stainless steel and will successfully heat up and maintain the

£10.99
New
Submersible Aquarium Heater 25W/50W/100W/200W/300W Fish Tank Thermostat - UK
Power: 25W. Power: 200W. Power: 300W. Power: 50W. Power: 100W. Aquarium Heater/Thermostat ( 25W/50W/100W/200W/300W ). Ad

£7.00
New
Hidom Submersible Tropical Fish Tank Aquarium Heater & Thermostat + Thermometer
These quality heaters are easy to adjust, and will regulate the temperature in your aquarium. Ideal for Tropical / Marin

£11.45
New
USB Mini Aquarium Fish Tank Heater Thermostat Submersible Heater LED Heating Rod
1 Piece Fish Tank Heater Rod. -Mini size, saving space in the fish tank and is more beautiful. -USB heating rod, the tem

£9.39
New
Interpet EU Deltatherm Aquarium Heater Fish Tank Heating 2 Pin Plug Submersible
Interpet Deltatherm Aquarium Heater -EU Plug. Interpet Nano Aquarium Fish Tank Heater Delta Mini 15w Preset Flexible Fla

£10.95
New
Submersible Aquarium Tropical Fish Tank Heater Quartz Adjustable Temp 50 to 300w
Say farewell to chilly waters and hello to a toasty haven! 300W - suitable for tanks 150L-250L. Whether you have a small

£19.99
New
300w Aquarium Fish Tank Heater Submersible Thermostat for Tropical Tank
You are purchasing a high quality 300w Aquarium for use with aquarium up to 300 litres in size. Power: 300W. The tempera

£13.49

25 Aquarium Heaters deals are available from: Amazon, eBay stores, starting from £7.00.
The biggest discount we found is 10%% on HITOP HP-608 Submersible Aquarium Heater 25W 50W With Thermometer and Extra Sucker Cup (50W) at Amazon.
The lowest price we found is £7.00 while the highest is £26.99.
Prices for the best Aquarium Heaters deals average at £14.53.
Last updated on December 14, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Aquarium Heaters.