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Hydor Theo Aquarium Heater (300 watts)
Provide your aquarium with the most advanced aquarium heater technology available with Hydor THEO Aquarium Heaters. These heaters feature a unusual cylindrical shape that renders them virtually shatterproof. Their special PTC, or positive thermal coefficient, heating element as well as their unique special polymer sheet silk-screened with heating heat (similar to a car's defroster) which allows the unit to run dry for a short time without damage, making these some of the most efficient and safe aquarium heating devices.
The fully submersible nature of the THEO makes it easy to conceal in gravel or behind tank ornaments as well. Combine all this with an easy-to-read temperature dial and you have one of the greatest aquarium heating bargains available.
High resistance - the first shatter proof heater
Position vertical, horizontal and completely submerged
Graduated scale for precise maintenance of set temperature