Hydor Theo 25W Glass Aquarium Heater

The THEO heater has all the essential features for the precise and safe maintenance of the water temperature in your aquarium. The exclusive technology used and the high quality of the components guarantee a long life. Ideal also for turtle tanks, the heater is submersible, anti-thermal shock, highly resistant and features a graduated scale for precise temperature regulation. It can be positioned horizontally or vertically.


  • Internal heater for aquariums and turtle tanks
  • Compact shape, ideal for all types of tanks
  • Fully submersible, reliable and long lasting
  • Easy to position thanks to the suction cups supplied
  • Equipped with graduated scale for temperature adjustment, precise maintenance of set temperature
  • It can be positioned horizontally or vertically even completely immersed
  • Maximum safety thanks to the PTC heating element and the shatterproof glass tube, resists thermal shocks
  • The Hydor PTC film self-controls temperature by limiting the power in case of abnormal functioning. The appliance stops automatically.
  • Glass tube: double thickness compared to traditional heaters on the market


  • Diameter: 3cm
  • Length: 17.8cm
  • Voltage: 220-240V
  • Suitable for tanks between 10-25L


Brand Hydor Aquarium
Model # T11706
Barcode # 8011195044344
Shipping Weight 0.4000kg