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300, 400, 500 & 1000 Watt Heaters
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Hydor 400 Watt Theo Aquarium Heater
Hydor 400 Watt Theo Aquarium Heater
Back Order
Our Price: $25.00 (Out of Stock)

Hydor Theo 400 Watt Aquarium Heater is a fully submersible, shatter-proof  glass aquarium heater.
  • Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube
  • Free positioning in aquarium with supplied suction cups
  • Self-limiting: the patented PTC heating system guarantees operation in complete safety because in case of dry running there is no danger for damage
  • Temperature range: 70-94 degrees Fahrenheit
Hydor InLine Aquarium Heater, 300W
Hydor InLine Aquarium Heater, 300W
Usually Ships in 1 to 2 Business Days
Our Price: $54.00 In Stock!

The Hydor InLine 300W aquarium heater connects to flexible hose coming from an external pump or filter.
  • Completely safe. No danger of damage if the equipment is left running without water for a short period of time
  • Patented heating element made with the exclusive PTC system. The traditional metal resistor coils have been replaced by a special polymer sheet, silk-screened with heating ink
  • Setting of temperature controlled by an electronic circuit with indicator light
  • Temperature range: 64-92 degrees Fahrenheit
Hydor Theo 300 Watt Aquarium Heater
Hydor Theo 300 Watt Aquarium Heater
Usually Ships in 1 to 2 Business Days
Our Price: $24.50 In Stock!

Hydor Theo 300 Watt Aquarium Heater is a fully submersible, shatter-proof  glass aquarium heater.
  • Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube
  • Free positioning in aquarium with supplied suction cups
  • Self-limiting: the patented PTC heating system guarantees operation in complete safety because in case of dry running there is no danger for damage
  • Temperature range: 70-94 degrees Fahrenheit