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    Hydor ETH 200 In-Line Heater 200 Watt - 1/2 inch

    Hydor ETH 200 In-Line Heater 200 Watt - 1/2 inch

    A heater is an important part of an aquarium especially when you own fish that naturally live in a different climate than where you live right now. Think of tropical fish inside an aquarium during the winter. Such fish will not fare well in a cold,... more

    $56.49

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    PetStore.com

    (2,500+)
    Hydor THEO UL Heater

    Hydor THEO UL Heater

    Hydor THEO UL Heater THEO aquarium heater has all the necessary features for safe and precise temperature maintenance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. 220/240V... more

    $26.29

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    Wag.com

    (1,000+)
    Hydor Theo Heater 200 watt

    Hydor Theo Heater 200 watt

    * Patented heating element automatically turns off if water level declines * Easy temperature adjustment - knob clicks at every degree change * Submersible heater with shatterproof glass resists breakage Patented heating film and special shatterproof... more

    $26.99

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    Hydor Hydrokable 25W Cable Heater, 25 watts, 14' Length

    Hydor Hydrokable 25W Cable Heater, 25 watts, 14' Length

    Hydor Hydrokable Cable HeaterThe Hydor Hydrokable (TM) guarantees regular and even heating. It generates a slow water circulation through the material on the bottom of the tank, thus creating the natural effect of water-bearing stratum. This heater is... more

    $29.99 $25.49

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    petco.com

    (200,000+)
    Hydor THEO UL Heater

    Hydor THEO UL Heater

    Hydor THEO UL Heater THEO aquarium heater has all the necessary features for safe and precise temperature maintenance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. 220/240V... more

    $18.99

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    Wag.com

    (1,000+)
    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 Mini Heater 7.5 Watt

    Hydor Mini Heater 7.5 Watt

    Hydor 7.5 Watt Mini Heater For Tanks 2.5 - 5 GallonsMINI HEATER helps increase by a few degrees Fahrenheit/Celsius the ambient water temperature of mini aquariums compared to the room temperature where they are positioned. They are fully submersible... more

    $12.99

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    "Hydor Usa Inc-Theo Shatterproof Heater- Clear 150 Watt"

    "Hydor Usa Inc-Theo Shatterproof Heater- Clear 150 Watt"

    "THEO SHATTERPROOF HEATERMade for aquariums up to 40 gal completely submersible, safe and shatterproof.Temperature controlled and maintained by a highly precise micro-switch, ptc element.Can be used positioned inside some hydor filters.UPC :... more

    $34.99

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    Hydor Theo Aquarium Heaters 300 watt

    Hydor Theo Aquarium Heaters 300 watt

    New aquarium heater functioning with the exclusive PTC (Positive Thermal Coefficient) technology. The first shatter-proof fish tank heater thanks to the peculiar glass tube. Free positioning in the aquarium: vertical, horizontal and completely... more

    $26.99

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    PetSolutions

    (25,000+)
    Hydor 400W Theo Aquarium Heater

    Hydor 400W 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

    $48.85

    FREE shipping

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    "Hydor Theo Heater 400 Watt for 80-105 Gallons (24/Cs)"

    "Hydor Theo Heater 400 Watt for 80-105 Gallons (24/Cs)"

    "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

    $31.96

    FREE shipping

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    "Hydor Theo Heater 300 Watt for 53-80 Gallons (24/Cs)"

    "Hydor Theo Heater 300 Watt for 53-80 Gallons (24/Cs)"

    "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

    $29.56

    FREE shipping

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    "Theo Shatterproof Heater, Size: 300 WATT, UPC# 841421000374, Mfg# T11402, Free Shipping"

    "Theo Shatterproof Heater, Size: 300 WATT, UPC# 841421000374, Mfg# T11402, Free Shipping"

    "Theo Shatterproof Heater Size: 300 WATT Miscellaneous AquariamShatterproof, safe, submersible.5.5 long.All items are brand new, never worn and never used. We guarantee the authenticity of all items.Thank you for shopping at The Pet Supply Company! " more

    $47.02

    FREE shipping

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    "Theo Shatterproof Heater, Size: 200 WATT, UPC# 841421000367, Mfg# T11302, Free Shipping"

    "Theo Shatterproof Heater, Size: 200 WATT, UPC# 841421000367, Mfg# T11302, Free Shipping"

    "Theo Shatterproof Heater Size: 200 WATT Miscellaneous AquariamAquarium heater ideal for up to 100 gallon tanks.All items are brand new, never worn and never used. We guarantee the authenticity of all items.Thank you for shopping at The Pet Supply... more

    $43.11

    FREE shipping

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    "Theo Shatterproof Heater, Color: Clear, Size: 150 WATT, UPC# 841421003214, Mfg# T11602, Free Shippi"

    "Theo Shatterproof Heater, Color: Clear, Size: 150 WATT, UPC# 841421003214, Mfg# T11602, Free Shippi"

    "Theo Shatterproof Heater Color: Clear Size: 150 WATT Miscellaneous AquariamMade for aquariums up to 40 gal completely submersible, safe and shatterproof.Temperature controlled and maintained by a highly precise micro-switch, ptc element.Can be used... more

    $41.18

    FREE shipping

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    Hydor THEO Submersible Aquarium Heater

    Hydor THEO Submersible Aquarium Heater

    $17.99

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    Hydor Theo Ul Heater - 50 Watt

    Hydor Theo Ul Heater - 50 Watt

    Features THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. 220/240V ~ 50/60Hz 115V... more

    $23.99

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    In Line Heater Eth 300W 53-80G Hydor Usa, Inc.

    In Line Heater Eth 300W 53-80G Hydor Usa, Inc.

    Easy to connect to any canister filter, the ETH External In-Line Heater is suitable for both freshwater and marine aquariums. Installs vertically on the return line of a canister filter or sump, allowing for better heat distribution as water returns to... more

    $45.52

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    Hydor Theo Ul Heater - 100 Watt

    Hydor Theo Ul Heater - 100 Watt

    Features THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. 220/240V ~ 50/60Hz 115V... more

    $23.99

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    Hydor Theo Ul Heater - 400 Watt

    Hydor Theo Ul Heater - 400 Watt

    Features THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. 220/240V - 50/60Hz 115V... more

    $35.99

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    Heater Mini Hydor Usa, Inc.

    Heater Mini Hydor Usa, Inc.

    The 15 Watt Mini heater will increase the water temperature in a 5 to 10 gallon aquarium 4 to 5 degrees above the room temperature. Suitable for marine or tropical aquariums, the Mini heater is completely submersible and easy to hide. 15W 5-10 Gal more

    $10.60

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    Theo Heater Hydor Usa, Inc.

    Theo Heater Hydor Usa, Inc.

    The Theo aquarium heater has all the necessary features for safe and precise temperature maintenance. The Theo is shatter-proof and shock resistant thanks to a peculiar glass tube and PTC heating element. Suitable for marine or tropical aquariums, the... more

    $20.59

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    "Hydor Inline Heater 200 Watt With 5/8"" Hose Connections "

    "Hydor Inline Heater 200 Watt With 5/8"" Hose Connections "

    $46.99

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    "Hydor Inline Heater 300 Watt With 5/8"" Hose Connections "

    "Hydor Inline Heater 300 Watt With 5/8"" Hose Connections "

    $50.99

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    Heat Stik Mini Submersible Heater 60watt

    Heat Stik Mini Submersible Heater 60watt

    "Deep Blue Professional - DB Heat StiK - Mini. 60W Mini Submersible Heater Features: Fully submersible, place anywhere in your aquarium. Slim, compact footprint conceals easily behind ornaments & decorations. Ideal for desktop systems. Preprogrammed,... more

    $8.12

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    Heat Stik Mini Submersible Heater 15watt

    Heat Stik Mini Submersible Heater 15watt

    "Deep Blue Professional - Heat Stik Mini Submersible Heater 15W. Fully submersible, place anywhere in your aquarium. Slim, compact footprint conceals easily behind ornaments & decorations. Ideal for desktop systems. Preprogrammed, no adjustments... more

    $8.12

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    Heat Stik Mini Submersible Heater 30watt

    Heat Stik Mini Submersible Heater 30watt

    "Deep Blue Professional - DB Heat StiK - Mini. 30W Mini Submersible Heater Features: Fully submersible, place anywhere in your aquarium. Slim, compact footprint conceals easily behind ornaments & decorations. Ideal for desktop systems. Preprogrammed,... more

    $8.12

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    Hydor Mini Aquarium Heater 5-410040

    Hydor Mini Aquarium Heater 5-410040

    Helps to increase water temperature of mini aquariums by a few degrees, compared to room temperature where positioned. For 5-10 gallon aquariums.Size: 15 Watt more

    $7.80

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