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Hydor Theo Heater 400 Watt for 80-105 Gallons

Hydor Theo Heater 400 Watt for 80-105 Gallons

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

$45.29 $25.95

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Hydor Theo Heater 300 Watt for 53-80 Gallons

Hydor Theo Heater 300 Watt for 53-80 Gallons

Hydor 300W Submersible Glass Aquarium Heater - Original Theo (Pack of 1) more

$99.97 $25.99

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

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

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

$8.09

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"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 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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Hydor Theo Heater - Submersible Aquarium Heater - T11702

Hydor Theo Heater - Submersible Aquarium Heater - T11702

Submersible aquarium heater. UL listed. Safe and reliable. Made from specially enginereed shatterproof glass. Temperature controlled and maintained by precise micro-switch. 25 Wats - 6.9" Long (2-7 Gallons) more

$19.97

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Hydor In-Line External Heater - Original ETH 200 Watt 1/2'

Hydor In-Line External Heater - Original ETH 200 Watt 1/2'

Hydor In-Line External Heater - Original ETH Size:200 Watt 1/2 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.... more

$76.30

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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 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 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 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 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 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

$24.95

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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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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 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

$24.95

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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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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 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 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 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 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 400 Watt - 15.5"" Long - (80 - 105 Gallons)" more

$32.92

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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

$22.74

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

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

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

$20.79

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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

$40.94

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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 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

$44.09

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"Hydor 200W In-Line Heater, 1/2"" Connection"

"Hydor 200W In-Line Heater, 1/2"" Connection"

"The Hydor 200W In-Line Heater, 1/2"" Connection, is designed for vertical use in most aquarium applications involving water hose of the specified diameter. The ETH must be used in a vertical manner for correct operation. Must be used in line. Not... more

$83.84 $56.59

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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 Slim Heater for Micro Tanks & Mini Aquariums - T20301

Hydor Slim Heater for Micro Tanks & Mini Aquariums - T20301

Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned. Aquariums 5-10 Gallons (15 Watts) more

$9.97

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Hydor Slim Heater for Micro Tanks & Mini Aquariums - T20201

Hydor Slim Heater for Micro Tanks & Mini Aquariums - T20201

Helps increase by a few degrees Fahrenheit/Celsius the water temperature of mini aquariums compared to the room temperature where they are positioned. Aquariums 2-5 Gallons (7.5 Watts) more

$8.97

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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 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 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 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 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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