BioMaster Thermo 850 an external filter that includes a heater it to both filter and heat a large fish tank
BioMaster & Thermo External Filters
BioMaster & BioMaster Thermo external filters by Oase are suitable for large aquariums. If you click 'yes' to a heater, this filter will come with an Oase HeatUp heater installed. If you choose 'no' to the heater, a HeatUp can be added later on, and fits neatly into the filter. See below for details of the heater wattage needed. HeatUp by Oase is the only recommended heater for use with this filter. The pump is energy efficient and quiet.
not rated £229.99£374.99 Select options
An external fish tank heater by Oase, FiltoSmart 300
FiltoSmart & Thermo External Filters
FiltoSmart and FiltoSmart Thermo 300 by Oase are external filters suitable for medium to large aquariums of 300 litres volume or less. The pump is energy efficient and quiet. If you choose the Thermo version, the heater is neatly installed into the filter and fully controllable so that you can choose the best temperature for your fish.
not rated £154.99£179.99 Select options
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VisiTherm Mini Heater 10W
The Aquarium Systems VisiTherm Mini (10w) is a miniature submersible heater suitable for 10-20L aquariums
not rated £21.29 Add to basket
Sale! Visitherm 300 watt quartz heater for heating an aquarium
VisiTherm Heaters
VisiTherm aquarium heaters are a range of high precision fully submersibles suitable for any type of aquarium
  • 25W heats 15 – 25 litres
  • 50W heats 25 – 50 litres
  • 100W heats 50 - 100 litres
  • 150W heats 75 - 150 litres
  • 200W heats 100 - 200 litres
  • 300W heats 200 - 300 litres
For more information, please read our longer description below
not rated £16.99£21.99 Select options