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    Best Seller
    Hydor Theo Aquarium Heater, 300-Watt

    Hydor Theo Aquarium Heater, 300-Watt

    Hydor 300W Submersible Glass Aquarium Heater - Original Theo (Pack of 1) more

    $99.97 $25.99

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    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    300W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 53-80 gallons.Length - 15.5"Part #: AHY00037Item Name: Theo... more

    $25.95

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    Best Seller
    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    300W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 53-80 gallons.Length - 15.5 Part #: AHY00037Item Name: Theo... more

    $34.61

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    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    300W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 53-80 gallons.Length - 15.5 Part #: AHY00037Item Name: Theo... more

    $34.61

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    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    300W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 53-80 gallons.Length - 15.5 Part #: AHY00037Item Name: Theo... more

    $34.61

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    Hydor ETH External Thermal Heater (In Line) - T08203

    Hydor ETH External Thermal Heater (In Line) - T08203

    200W & 300W in-line aquarium heater suitable for all canister filters with 5/8" flexible hosing. No danger of damage if unit is run dry for short period as the ETH will switch itself off before overheating. Heats with high efficiency and designed to... more

    $59.97

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    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    Hydor Usa Inc. Theo 300 Watt Submersible Shatterproof Heater 15.5" Hy00037

    300W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 53-80 gallons.Length - 15.5 Part #: AHY00037Item Name: Theo... more

    $34.61

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