Hydor THEO Submersible Aquarium Heater can be placed anywhere in your aquarium. This new aquarium heater features PTC technology which means that it won’t break or damage when run out of the tank. This unit is pretty accurate due to the use of precise micro switch technology. This Theo aquarium heater can be used in freshwater or marine aquarium.

Hydor THEO Submersible Aquarium Heater 25 Watt


Product Features

  • High resistance – the first shatter proof heater
  • Shock resistant
  • Position vertical, horizontal and completely submerged
  • Graduated scale for precise maintenance of set temperature
  • No damage in case of running dry

Some customer reviews

“I really like the Hydor line of heaters especially the 25 watt ones because they are short enough to fit very nicely into a 2.5 gallon tank for a betta and are easy enough to hide behind decor but provide enough power to easily heat a 5 gallon. They also seem pretty durable. The only thing I don’t like is it seems to take a little bit of extra fiddling to figure out where to set the temp but that seems par for the course with most heaters.” — Andi

“ok they work but i havn’t found a heater that works good ..” — cptice

This product is also available in these merchants
– Amazon buy-now
– Entirelypets  buy-now
– Bigalsonline buy-now

Frequently Bought Together
Battery Operated Digital Thermometer

Posted in : Aquariums and Accessories, Fish & Aquatic Pets

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