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    Hydor 100W Submersible Glass Aquarium Heater - Original Theo (Pack of 1)

    Hydor 100W Submersible Glass Aquarium Heater - Original Theo (Pack of 1)

    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

    $31.98

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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

    $26.98

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    Hydor Usa Inc. Theo 400 Watt Submersible Shatterproof Heater 15.5" Hy0

    Hydor Usa Inc. Theo 400 Watt Submersible Shatterproof Heater 15.5" Hy0

    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 Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy000

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy000

    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" Hy000

    Hydor Usa Inc. Theo 200 Watt Submersible Shatterproof Heater 12" Hy000

    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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    Heater Mini 15W 5-10 gal

    Heater Mini 15W 5-10 gal

    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. more

    $11.99

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    In Line Heater Eth 300W 53-80G

    In Line Heater Eth 300W 53-80G

    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

    $56.99

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    Hydor Slim Heater 15W (Mfg# T203201)

    Hydor Slim Heater 15W (Mfg# T203201)

    Easily warm your miniature aquarium to a comfortable, hospitable temperature that helps keep your fish thriving! Fully submersible Hydor Slim Aquarium Heater feature plug-and-go design, shock-proof construction, and a sleek shape that blends in with... more

    $10.99

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    Hydor Slim Heater 7.5W (Mfg# T20201)

    Hydor Slim Heater 7.5W (Mfg# T20201)

    Easily warm your miniature aquarium to a comfortable, hospitable temperature that helps keep your fish thriving! Fully submersible Hydor Slim Aquarium Heater feature plug-and-go design, shock-proof construction, and a sleek shape that blends in with... more

    $9.99

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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

    $27.40

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    Hydor USA Eth In-Line Heater, 300 watt

    Hydor USA Eth In-Line Heater, 300 watt

    Features: First and unique external heater for aquariums with the exclusive PTC (Positive Thermal Coefficient) technology The self-limiting PTC heating element guarantees maximum safety against any risk of overheating The exclusive technology and the... more

    $71.40

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    Hydor Theo Heater 400 Watt for 80-105 Gallons

    Hydor Theo Heater 400 Watt for 80-105 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

    $37.98

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

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

    For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information. HYDOR USA, INC. IN LINE HEATER ETH 300W 53-80G Size: 300 Watt 5/8'. more

    $50.98

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    Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose

    Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose

    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 avoid... more

    $47.95

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    PetFenceUSA

    (250+)
    Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose

    Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose

    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 avoid... more

    $47.95

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    Fluval Edge Compact Aquarium Heater (25 w)

    Fluval Edge Compact Aquarium Heater (25 w)

    The Fluval 25 watt compact aquarium heater is an automatic, submersible heater for use in indoor aquariums. Without any adjustments needed, it is designed to reach and maintain the set temperature of 26C (78F). The exterior is made of a tough polymer... more

    $44.99 $24.89

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    Fluval M300 Submersible Glass Aquarium Heater (300 watts)

    Fluval M300 Submersible Glass Aquarium Heater (300 watts)

    The Fluval "M" 300 watt submersible heater is quality manufactured in Europe using superior components and construction. This sleek, compact Fluval heater can be trusted for exceptional performance and unsurpassed reliability. Unique only to the Fluval... more

    $33.79 $25.99

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    Hydor Submersible Aquarium Heater 50 Watt - 7 Inch Long - (5 - 14 Gallons)

    Hydor Submersible Aquarium Heater 50 Watt - 7 Inch Long - (5 - 14 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

    $29.07

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    Precision Heater 75W

    Precision Heater 75W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $19.99

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    Precision Heater 100W

    Precision Heater 100W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $20.99

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    Precision Heater 50W

    Precision Heater 50W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $19.99

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    Precision Heater 200W

    Precision Heater 200W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $24.99

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    Precision Heater 400W

    Precision Heater 400W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $42.99

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    Precision Heater 150W

    Precision Heater 150W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $21.99

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    Precision Heater 300W

    Precision Heater 300W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $24.99

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    Precision Heater 250W

    Precision Heater 250W

    Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the... more

    $25.99

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    Aqueon Pro Heater 200 Watt

    Aqueon Pro Heater 200 Watt

    Pro Heaters are precision calibrated aquarium heaters that are full submersible • Power Monitor light (Green �\" Heating ; Red �\" Aquarium at set temperature) • Shatterproof and Nearly Indestructible • Electronic Thermostat for Safety and Accurate... more

    $34.99

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    Aqueon Pro Heater 150 Watt

    Aqueon Pro Heater 150 Watt

    Pro Heaters are precision calibrated aquarium heaters that are full submersible • Power Monitor light (Green �\" Heating ; Red �\" Aquarium at set temperature) • Shatterproof and Nearly Indestructible • Electronic Thermostat for Safety and Accurate... more

    $32.99

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    Aqueon Pro Heater 50 Watt

    Aqueon Pro Heater 50 Watt

    Pro Heaters are precision calibrated aquarium heaters that are full submersible • Power Monitor light (Green �\" Heating ; Red �\" Aquarium at set temperature) • Shatterproof and Nearly Indestructible • Electronic Thermostat for Safety and Accurate... more

    $30.99

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    Aqueon Pro Heater 100 Watt

    Aqueon Pro Heater 100 Watt

    Pro Heaters are precision calibrated aquarium heaters that are full submersible • Power Monitor light (Green �\" Heating ; Red �\" Aquarium at set temperature) • Shatterproof and Nearly Indestructible • Electronic Thermostat for Safety and Accurate... more

    $31.99

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    100W Heater Digital Dual Dual Display

    100W Heater Digital Dual Dual Display

    Dual digital display heater instantly displays current aquarium water temperature and makes it easy to set target temperature so you never have to check what the temperature is. Maintaining a constant temperature in your aquarium creates an environment... more

    $52.99

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    Aqueon Pro Heater 250 Watt

    Aqueon Pro Heater 250 Watt

    Pro Heaters are precision calibrated aquarium heaters that are full submersible • Power Monitor light (Green �\" Heating ; Red �\" Aquarium at set temperature) • Shatterproof and Nearly Indestructible • Electronic Thermostat for Safety and Accurate... more

    $36.99

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    Heater Submersible Ht55 200W 40-55 gal

    Heater Submersible Ht55 200W 40-55 gal

    This pre-set heater technology. For 40 �\" 55 gallon aquariums (200W). UL listed device. This item replaces item # 26454, but with a lower item cost. Same product design/look as the rest of the HT heater line (overall new heater line look graphics &... more

    $17.99

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    Heater Submersible Ht40 150W

    Heater Submersible Ht40 150W

    This heater completes the HT heater line. Pre- set heater technology. Easy to use and conceal. For aquariums 30 �\" 40 gallons (150W). UL listed device. New line look sales box. 2 year warranty. more

    $17.99

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    Tetra HT Submersible Aquarium Heater HT30 100W (Mfg# 26446)

    Tetra HT Submersible Aquarium Heater HT30 100W (Mfg# 26446)

    Easy-to-use submersible heaters automatically maintain aquarium water temperature at 78 degreeF (+/-2 degree). Tetra HT Submersible Aquarium Heaters feature an electronic thermostat that adjusts heat output to maintain constant water temperature.... more

    $11.99

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    Tetra HT Submersible Aquarium Heater HT40 150W (Mfg# 26462)

    Tetra HT Submersible Aquarium Heater HT40 150W (Mfg# 26462)

    Easy-to-use submersible heaters automatically maintain aquarium water temperature at 78 degreeF (+/-2 degree). Tetra HT Submersible Aquarium Heaters feature an electronic thermostat that adjusts heat output to maintain constant water temperature.... more

    $16.99

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    Hydor Usa Inc AHY00017 External Thermal Aquarium Heater

    Hydor Usa Inc AHY00017 External Thermal Aquarium Heater

    long description is not available more

    $83.84 $66.98

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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 150 Watt - 12" Long - (23 - 40 Gallons) more

    $27.40

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    Hydor Submersible Aquarium Heater 400 Watt - 15.5" Long - (80 - 105 Gallons)

    Hydor Submersible Aquarium Heater 400 Watt - 15.5" Long - (80 - 105 Gallons)

    Hydor Submersible Aquarium Heater 150 Watt - 12" Long - (23 - 40 Gallons) more

    $39.28

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    Hydor Submersible Aquarium Heater 150 Watt - 12" Long - (23 - 40 Gallons)

    Hydor Submersible Aquarium Heater 150 Watt - 12" Long - (23 - 40 Gallons)

    Hydor Submersible Aquarium Heater 150 Watt - 12" Long - (23 - 40 Gallons) more

    $30.73

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