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    THEO Heater - 150W - Up to 40 gal.

    THEO Heater - 150W - Up to 40 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

    $29.99

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    Hydor 150W Submersible Glass Aquarium Heater - Original Theo

    Hydor 150W Submersible Glass 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

    $26.84

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    Jager Heater 150W 13"

    Jager Heater 150W 13"

    The EHEIM TruTemp Jager heaters cover a larger surface area for better heat distribution. Heater comes pre-calibrated. In order to adjust the temperature change ONLY the BLUE dial. For accurate heating of the water be sure that water is at the minimum... more

    $35.99

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    Neo-Therm Plastic Led 150W

    Neo-Therm Plastic Led 150W

    The all new Cobalt Aquatics NEO-Therm electronic heaters feature a modern, super flat design with an easy to set “one touch” control system. The advanced electronic thermostat is accurate to ±0.5ºF and includes a LED that displays both the Set Temp and... more

    $54.99

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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

    $25.95

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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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    Peazz Pet

    (2,500+)
    Marineland Precision Submersible Heater 150W Heater (Mfg# ML90651-00)

    Marineland Precision Submersible Heater 150W Heater (Mfg# ML90651-00)

    Enjoy safe, reliable heater performance for stable aquarium water temperatures. Marineland Precision Submersible Heater features a thermal safety switch to prevent heater failure during operation. Heater turns off automatically when temperature exceeds... more

    $25.99

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    Theo Heater 50 watt

    Theo Heater 50 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

    $19.99

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    150w/300w/500w In-Line External Heater AQUARIUM HEATER - 150/300/500 WATT 1/2"-5/8" (300 Watt 1/2"(12/16mm) Hose)

    150w/300w/500w In-Line External Heater AQUARIUM HEATER - 150/300/500 WATT 1/2"-5/8" (300 Watt 1/2"(12/16mm) Hose)

    Features:1. Thermal spraying glass, speed up the heating process, higher efficiency.2. External design, easy to install and doesn’t occupy space in the tank.3. Two sensors to exam the temperatures of water inlet and outlet.4. Auto power off safety... more

    $63.99

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    Hydor Theo Aquarium Heater, 25 Watts

    Hydor Theo Aquarium Heater, 25 Watts

    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 the water in... more

    $18.89

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    THEO Heater - 100W - Up to 26 gal.

    THEO Heater - 100W - Up to 26 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

    $23.99

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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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    Hydor 150W Submersible Aquarium Heater - Original Theo

    Hydor 150W Submersible Aquarium Heater - Original Theo

    150W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 23-40 gallons. Length - 12'' more

    $25.45

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    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

    $14.49

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    Hydor 300W Theo Aquarium Heater

    Hydor 300W 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

    $46.19

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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

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    "Theo Shatterproof Heater, Color: Clear, Size: 400 WATT, UPC# 841421003207, Mfg# T11502, Free Shippi"

    "Theo Shatterproof Heater, Color: Clear, Size: 400 WATT, UPC# 841421003207, Mfg# T11502, Free Shippi"

    "Theo Shatterproof Heater Color: Clear Size: 400 WATT Miscellaneous AquariamUse in aquariums up to 200 gal completely submersible.All items are brand new, never worn and never used. We guarantee the authenticity of all items.Thank you for shopping at... more

    $48.96

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    "Hydor Theo Heater 200 Watt for 26-53 Gallons (24/Cs)"

    "Hydor Theo Heater 200 Watt for 26-53 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

    $26.36

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    "Hydor Usa Inc-Theo Shatterproof Heater 300 Watt"

    "Hydor Usa Inc-Theo Shatterproof Heater 300 Watt"

    "THEO SHATTERPROOF HEATERShatterproof, safe, submersible.5.5 long.UPC : 841421000374Size : 300 WATTLength : 3.5Width : 2Height : 17.5Product Type : Aquatics - Heaters / SubmersibleShipping Dimensions: 3.5x2x17.5" more

    $40.99

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    "Hydor Usa Inc-Theo Shatterproof Heater 100 Watt"

    "Hydor Usa Inc-Theo Shatterproof Heater 100 Watt"

    "THEO SHATTERPROOF HEATERAquarium heater ideal for up to 50 gallon tanks.UPC : 841421000350Size : 100 WATTLength : 3.5Width : 2Height : 11.5Product Type : Aquatics - Heaters / SubmersibleShipping Dimensions: 3.5x2x11.5" more

    $31.99

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    Hydor Theo Heater 400 watt

    Hydor Theo Heater 400 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

    $31.99

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    Hydor Usa Inc. Theo 400 Watt Submersible Shatterproof Heater 15.5" Hy00320

    Hydor Usa Inc. Theo 400 Watt Submersible Shatterproof Heater 15.5" Hy00320

    400W submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. For aquariums 80-105 gallons.Length - 15.5"Part #: AHY00320Item Name: Theo... more

    $29.95

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    PetFenceUSA

    (250+)
    Hydor Theo Aquarium Heater (25 watts)

    Hydor Theo Aquarium Heater (25 watts)

    $20.99

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    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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    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 200W Submersible Aquarium Heater - Original Theo

    Hydor 200W Submersible Aquarium Heater - Original Theo

    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'' more

    $27.05

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    Hydor Theo Heater 100 watt

    Hydor Theo Heater 100 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

    $22.00

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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

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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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    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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    PetFenceUSA

    (250+)
    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+)
    Tetra Heater Submersible Ht40 150w

    Tetra Heater Submersible Ht40 150w

    "150 watt submersible heater for tanks 30 to 40 gallons Electronic thermostat automatically maintains water temperature and prevents overheating, extending heater life No adjustments are needed The indicator light lets you know when the water is being... more

    $19.98

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    "Eheim Jager Heater 150w 13"""

    "Eheim Jager Heater 150w 13"""

    The EHEIM TruTemp Jager heaters cover a larger surface area for better heat distribution. Heater comes pre-calibrated. In order to adjust the temperature change ONLY the BLUE dial. For accurate heating of the water be sure that water is at the minimum... more

    $25.57

    FREE shipping

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    Heat Stik Submersible Quartz Heater 15-150w

    Heat Stik Submersible Quartz Heater 15-150w

    Deep Blue Professional - DB Heat StiK - Pro Series. 150W Submersible Quartz Heater Maximum strength quartz silica tube which is shatter resistant & more durable than conventional glass heater. Easy set thermostat provides precise and accurate thermal... more

    $20.95

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    Accu Therm Heater 150w (glass)

    Accu Therm Heater 150w (glass)

    Cobalt - Accu Therm Heater 150W. The all new Cobalt Aquatics ACCU-Thern fully submersible heaters feature an easy to set thermostat with andON/OFF indicator light that is Triac equipped that turns the heater on and of at lower voltage to extend life... more

    $26.56

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    JBJ True Temp Titanium Heating System 150w

    JBJ True Temp Titanium Heating System 150w

    JBJ introduces the TRUE TEMP digital heater controller and titanium heating system. The TRUE TEMP is the most complete heating system to date with the most advanced features that set it apart as the leading heater for professional hobbyists.Our digital... more

    $99.99 $89.99

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    Upg-Marineland Edwardsville Precision Heater 150W

    Upg-Marineland Edwardsville Precision Heater 150W

    For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information. UPG-MARINELAND EDWARDSVILLE PRECISION HEATER 150W 150W Get precise control of your aquarium temperature with the Precision... more

    $33.61

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    Hydor Theo Heater 300 Watt for 53-80 Gallons

    Hydor Theo Heater 300 Watt for 53-80 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

    $26.99

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    Hydor Theo Aquarium Heater, 200 Watts

    Hydor Theo Aquarium Heater, 200 Watts

    Hydor Theo Aquarium Heater, 200 Watts: 200 watts Temperature controlled and maintained by a highly precise micro-switch Dimensions: 3.5"L x 2"W x 14.5"H Your pet will love it more

    $22.24

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    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

    $23.99

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