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    Best Seller
    Hydor Mini Submersible Aquarium Heater, 15-Watt

    Hydor Mini Submersible Aquarium Heater, 15-Watt

    Mini Submersible Heater 15 Watts - (For Aquariums 5-10 Gallons) more

    $8.44

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    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 6

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 6

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 6 count more

    $74.36

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    Best Seller
    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 12

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 12

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 12 count more

    $138.14

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    Hydor Theo Aquarium Heater (25 watts)

    Hydor Theo Aquarium Heater (25 watts)

    Hydor Theo Aquarium Heater (25 watts) 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... more

    $22.99 $19.99

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    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Automatically sets and maintains your desired temperature. Accurate to 1 degree. Fully submersible. Can be used for fresh and salt water aquariums. more

    $19.99 $17.06

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    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Automatically sets and maintains your desired temperature. Accurate to 1 degree. Fully submersible. Can be used for fresh and salt water aquariums. more

    $17.50

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    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium - CH875

    Automatically sets and maintains your desired temperature. Accurate to 1 degree. Fully submersible. Can be used for fresh and salt water aquariums. more

    $17.50

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    "ETH In-Line Heater 200 watt, 5/8"""

    "ETH In-Line Heater 200 watt, 5/8"""

    "Prevents temperature variations caused by poor water circulation Precise, accurate temperature setting Indicator light shows when unit is ""ON"" Double insulated and double sealed The first compact aquarium heater that operates externally, saving... more

    $54.99

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    (275,000+)
    Theo Heater 150 watt

    Theo Heater 150 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 glass... more

    $24.99

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    (275,000+)
    "ETH In-Line Heater 200 watt, 1/2"""

    "ETH In-Line Heater 200 watt, 1/2"""

    "Prevents temperature variations caused by poor water circulation Precise, accurate temperature setting Indicator light shows when unit is ""ON"" Double insulated and double sealed The first compact aquarium heater that operates externally, saving... more

    $54.99

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    (275,000+)
    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

    $25.95

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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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    Pet Hoot

    (2,500+)
    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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    Peazz

    (100+)
    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    100W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. Extremely compact at 8.9 . For aquariums 14-26 gallons.Length - 8.9 Part... more

    $33.36

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    Pet Hoot

    (2,500+)
    Hydor Usa Inc. Eth201 200 Watt External In - Line Heater For 5/8" Hose Hy00018

    Hydor Usa Inc. Eth201 200 Watt External In - Line Heater For 5/8" Hose Hy00018

    200W 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 avoid... more

    $47.95

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    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    200W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 26-53 gallons.Length - 12 Part #: AHY00036Item Name: Theo... more

    $34.61

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    Pet Hoot

    (2,500+)
    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    200W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 26-53 gallons.Length - 12"Part #: AHY00036Item Name: Theo... more

    $25.95

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    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    100W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. Extremely compact at 8.9 . For aquariums 14-26 gallons.Length - 8.9 Part... more

    $33.36

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    Peazz

    (100+)
    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    200W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 26-53 gallons.Length - 12 Part #: AHY00036Item Name: Theo... more

    $34.61

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    Hydor Theo Aquarium Heater (25 watts), Multicolor

    Hydor Theo Aquarium Heater (25 watts), Multicolor

    Hydor Theo Aquarium Heater (25 watts) 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... more

    $23.31

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    Hydor Usa Inc. Theo 50 Watt Submersible Shatterproof Heater 7" Hy00034

    Hydor Usa Inc. Theo 50 Watt Submersible Shatterproof Heater 7" Hy00034

    50W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. Extremely compact at 7 . For aquariums 5-14 gallons.Length - 7 Part #:... more

    $33.36

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    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy00036

    200W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 26-53 gallons.Length - 12 Part #: AHY00036Item Name: Theo... more

    $34.61

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    Peazz

    (100+)
    Hydor Usa Inc. Eth201 200 Watt External In - Line Heater For 5/8" Hose Hy00018

    Hydor Usa Inc. Eth201 200 Watt External In - Line Heater For 5/8" Hose Hy00018

    200W 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 avoid... more

    $58.24

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    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    Hydor Usa Inc. Theo 100 Watt Submersible Shatterproof Heater 8.9" Hy00035

    100W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. Extremely compact at 8.9 . For aquariums 14-26 gallons.Length - 8.9 Part... more

    $33.36

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    Hydor Theo Heater - Submersible Aquarium Heater - T11102

    Hydor Theo Heater - Submersible Aquarium Heater - T11102

    Submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. 50 Watts - 7" Long (5-14 Gallons) more

    $21.97

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    Hydor Theo Heater - Submersible Aquarium Heater - T11502

    Hydor Theo Heater - Submersible Aquarium Heater - T11502

    Submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. 400 Wats - 15.5" Long (80-105 Gallons) more

    $29.97

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    Hydor Theo Heater - Submersible Aquarium Heater - T11402

    Hydor Theo Heater - Submersible Aquarium Heater - T11402

    Submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. 300 Watts - 15.5" Long (53-80 Gallons) more

    $27.97

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    Interpet Life Thermal Flat Aquarium Heater, 15-Watt

    Interpet Life Thermal Flat Aquarium Heater, 15-Watt

    15 Watt Flat Aquarium Heater Easy to hide 1. Hang over the side of the aquarium, attach using the suction cup. 2. Tuck away in the rear filtration area, attach using the suction cup. 3. Bury in the substrate. Constant heat output Life Thermal Flat... more

    $10.88

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    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium, Multicolor

    Penn Plax 8 in. 50 Watt Heater for 15 gal. Aquarium, Multicolor

    Penn-Plax is a family-owned company in operation since 1959. They specialize in creating excellent pet supplies for animals both great and small. Best known for producing pet products at affordable prices, the Penn-Plax brand is synonymous with... more

    $17.07

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    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 10

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 10

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 10 count more

    $116.88

    FREE shipping

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    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 3

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 5-10 Gallons (15 Watts) - Pack of 3

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 3 count more

    $45.98

    FREE shipping

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    Hydor ETH 200 In-Line External Aquarium Heater, 200-Watt, 5/8 Hose

    Hydor ETH 200 In-Line External Aquarium Heater, 200-Watt, 5/8 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

    $83.08 $58.98

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    Slim Heater for Bettas, Bowls and Aquariums 7.5 Watt, Oval, up to 5 gal, USA, Brand Hydor

    Slim Heater for Bettas, Bowls and Aquariums 7.5 Watt, Oval, up to 5 gal, USA, Brand Hydor

    Helps guarantee your fish a healthy life by promoting the ideal water temperature.Plug and Play, No temperature to setCan be positioned under gravelNo glass componentsHeater is UL listed more

    $17.79

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    Hydor Theo Aquarium Heater, 400-Watt

    Hydor Theo Aquarium Heater, 400-Watt

    Hydor 400W Submersible Glass Aquarium Heater - Original Theo (Pack of 1) more

    $45.29 $27.69

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    Hydor Theo Heater 200 Watt for 26-53 Gallons

    Hydor Theo Heater 200 Watt for 26-53 Gallons

    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

    $35.69

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    "Hydor Submersible Aquarium Heater 25 Watt - 6.9"" Long - (2 - 7 Gallons)"

    "Hydor Submersible Aquarium Heater 25 Watt - 6.9"" Long - (2 - 7 Gallons)"

    "Hydor Submersible Aquarium Heater 25 Watt - 6.9"" Long - (2 - 7 Gallons)" more

    $19.41

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    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 2-5 Gallons (7.5 Watts) - Pack of 10

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 2-5 Gallons (7.5 Watts) - Pack of 10

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 10 count more

    $107.14

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    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 2-5 Gallons (7.5 Watts) - Pack of 4

    Hydor Slim Heater for Micro Tanks & Mini Aquariums Aquariums 2-5 Gallons (7.5 Watts) - Pack of 4

    Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned.This is an offering for multi quantity bundle - 4 count more

    $51.59

    FREE shipping

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