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    Hydor Theo 200w Submersible Aquarium Heater (with Free Thermometer)

    Hydor Theo 200w Submersible Aquarium Heater (with Free Thermometer)

    HYDOR THEO 200 Watt SUBMERSIBLE HEATER with FREE AQUARIUM THERMOMETER (Pictured) - both items new in box!Theo Aquarium heater has all the necessary features for safe and precise temperature maintenance of the water in your tank. The exclusive... more

    $35.00

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    Hydor Theo Submersible Aquarium Heater - 200 Watt

    Hydor Theo Submersible Aquarium Heater - 200 Watt

    Hydor THEO Submersible Heater 200W Product #: HY-T11302 The first shatter-proof heater thanks to the peculiar glass tube. Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube. Free positioning in... more

    $29.95

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    Hydor 200W Submersible Aquarium Heater - Original Theo

    Hydor 200W Submersible Aquarium Heater - Original Theo

    Theo Heater. New aquarium heater functioning with the exclusive PTC technology means that this heater will not break or damage when run out of the tank. Theo aquarium heater has all the necessary feature for safe and precise temperature maintenance of... more

    $19.30

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    THEO Heater - 200W - Up to 53 gal.

    THEO Heater - 200W - Up to 53 gal.

    Provide your tank with the proper temperature with the most advanced heating technology available. THEO heaters are designed with a peculiar cylindrical shape that renders them virtually shatterproof. Fully submersible; THEO heaters function with the... more

    $27.99

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    Hydor Theo Submersible Aquarium Heater- 300 W (heats Up To 100 Gallons)

    Hydor Theo Submersible Aquarium Heater- 300 W (heats Up To 100 Gallons)

    Fully submersible heater you can position anywhere in your aquarium. Automatic shut-off in case heater runs out of the aquarium water. Highly accurate due to the use of precise micro switch technology. Shatterproof under normal aquarium situations. For... more

    $33.99

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    Hydor Theo Submersible Aquarium Heater- 25 W (heats Up To 10 Gallons)

    Hydor Theo Submersible Aquarium Heater- 25 W (heats Up To 10 Gallons)

    Fully submersible heater you can position anywhere in your aquarium. Automatic shut-off in case heater runs out of the aquarium water. Highly accurate due to the use of precise micro switch technology. Shatterproof under normal aquarium situations. For... more

    $26.99

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    Hydor Theo Heater 300 Watt

    Hydor Theo Heater 300 Watt

    Package Price? Questions? Call Us @ 810-299-2420 M-F 9AM-5PM EDT NEW Hydor Theo Heater 300 Watt Call us at 810-299-2420 for Special Packages Discretely labeled, Professionally packaged, shipped as fast as possible with care read the feedback for proof.... more

    $34.21

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    Hydor ETH 200 In-Line External Heater 200w 1/2" hose

    Hydor ETH 200 In-Line External Heater 200w 1/2" hose

    ETH Heaters are the first external heaters for aquariums with the exclusive PTC technology. The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. Designed to be used on return lines coming from canister... more

    $53.45

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    Hydor ETH 200 In-Line External Heater 200w 5/8" hose - Original Eth 201

    Hydor ETH 200 In-Line External Heater 200w 5/8" hose - Original Eth 201

    ETH Heaters are the first external heaters for aquariums with the exclusive PTC technology. The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. Designed to be used on return lines coming from canister... more

    $49.95

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    Hydor 50W Submersible Aquarium Heater - Original Theo

    Hydor 50W Submersible Aquarium Heater - Original Theo

    Theo Heater. New aquarium heater functioning with the exclusive PTC technology means that this heater will not break or damage when run out of the tank. Theo aquarium heater has all the necessary feature for safe and precise temperature maintenance of... more

    $20.41

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    ETH 201 In-Line Heater for 16mm or .625 in. Tubing - 200W

    ETH 201 In-Line Heater for 16mm or .625 in. Tubing - 200W

    The ETH external In-Line heater uses the advanced PTC system; which is a special polymer sheet silk-screened with heating ink (like your car's windshield defroster) instead of metal coils. This state-of-the-art system allows the unit to be left running... more

    $49.95

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    ETH 200 In-Line Heater for 12mm or .5 in. Tubing - 200W

    ETH 200 In-Line Heater for 12mm or .5 in. Tubing - 200W

    The ETH external In-Line heater uses the advanced PTC system; which is a special polymer sheet silk-screened with heating ink (like your car's windshield defroster) instead of metal coils. This state-of-the-art system allows the unit to be left running... more

    $49.95

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    THEO Heater - 50W - Up to 14 gal.

    THEO Heater - 50W - Up to 14 gal.

    Provide your tank with the proper temperature with the most advanced heating technology available. THEO heaters are designed with a peculiar cylindrical shape that renders them virtually shatterproof. Fully submersible; THEO heaters function with the... more

    $28.99

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    Theo Submersible Aquarium Heater - Wattage: 300

    Theo Submersible Aquarium Heater - Wattage: 300

    HYY1028: Features: -Theo submersible aquarium heater.-Shatter resistant glass.-No damage if run dry.-Easy to read scale for precise temperature setting.-Safe if freshwater or saltwater aquariums.-UL approved. Specifications: -Available in 50, 100, 200,... more

    $39.99 $32.34

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    Rakuten.com Shopping

    (1,000,000+)
    THEO SHATTERPROOF HEATER

    THEO SHATTERPROOF HEATER

    The Theo 400W Heater is perfect for uses in aquariums 80-105 gallons (300-400 liters). Product is completely submersible. Uses standard 110V outlet.Color: BlackSize: 3.5'' x 2'' x 17.5'' more

    $33.84

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    Rakuten.com Shopping

    (1,000,000+)
    Theo Submersible Aquarium Heater - Wattage: 200

    Theo Submersible Aquarium Heater - Wattage: 200

    HYY1028: Features: -Theo submersible aquarium heater.-Shatter resistant glass.-No damage if run dry.-Easy to read scale for precise temperature setting.-Safe if freshwater or saltwater aquariums.-UL approved. Specifications: -Available in 50, 100, 200,... more

    $37.32 $29.35

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    Rakuten.com Shopping

    (1,000,000+)
    Hydor THEO 200W (UL) Submersible Aquarium Heater, 200 Watts

    Hydor THEO 200W (UL) Submersible Aquarium Heater, 200 Watts

    Free Shipping on Orders Over $49!

    Hydor THEO (UL) Submersible Aquarium Heater - High Quality Fish Tank Water Heater and Aquarium Water Heater SelectionKeep your aquarium at the perfect temperature with the Hydor THEO (UL) Submersible Aquarium Heater. This sleek fish tank water heater... more

    $36.99 $23.99

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    petco.com

    (200,000+)
    Hydor 200W Theo Aquarium Heater

    Hydor 200W Theo Aquarium Heater

    Theo reservoir & aquarium heaters have all the necessary features for safe and precise temperature maintenance of the water in your tank or reservoir. The exclusive technology and the high quality of the components guarantee a long lasting product.... more

    $43.53

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    Hydor Theo Aquarium Heater (200 watts)

    Hydor Theo Aquarium Heater (200 watts)

    $29.99 $25.99

    FREE shipping

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    Hydor Theo UL Aquarium Heater 50 watts

    Hydor Theo UL Aquarium Heater 50 watts

    Hydor Theo Super Safe, Shatter Proof Heating Control your aquarium's temperature safely and precisely with the THEO aquarium heater . The THEO is suitable for marine and tropical aquariums. The THEO heater can be positioned in any way: vertically,... more

    $17.49

    FREE shipping

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