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Digital Thermometer 

Digital Thermometer

Algarde
Aquarium Thermometers available from 123 Aquatics
Available £1.99
Rena SmartHeater 

Rena SmartHeater

Rena
Rena SmartHeater available from 123 Aquatics
Available from
£5.29
Digital Thermometer 

Digital Thermometer

Reef One
Available £9.99
Eheim Jager Heaters 

Eheim Jager Heaters

Eheim
Available from
£13.99
Ecotherm Heater / Stat 

Ecotherm Heater / Stat

ecotherm
Available from
£14.99
TetraTec Heater Stat 

TetraTec Heater Stat

Tetra
Available from
£18.99
BiOrb Heater 

BiOrb Heater

Reef One
You can buy Aquarium heaters for you BiOrb fish tank to convert it for warm water
Available £19.49
Visi-Therm Aquarium Heater 

Visi-Therm Aquarium Heater

Eheim
Available from
£19.99
DeltaTherm Aquarium Heater Thermostat 

DeltaTherm Aquarium Heater Thermostat

Interpet
Available from
£20.49
Juwel Replacement Heater 

Juwel Replacement Heater

Juwel
Available £22.50
NeWatt Heater / Stat 

NeWatt Heater / Stat

Visitherm
Available from
£22.99
Root Therm Plant Substrate Heater 

Root Therm Plant Substrate Heater

Red Sea
Available from
£45.99
Aquarium heaters are essential for maintaining high enough temperatures for your tropical fish, especially in winter months. At 123 Aquatics, we stock a range of aquarium heaters from manufacturers such as Rena, Eheim, TetraTec, Visitherm and Interpet. All of our Rena fish tank heaters have built-in thermostats which automatically regulate the water temperature so you don't have to. However it is still advisable to use them with an aquarium thermometer to ensure the temperature the heater stat is set at is correct for your fish.