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

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

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

$20.79

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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

$24.57

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Hydor 25W Submersible Glass Aquarium Heater - Original Theo

Hydor 25W 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

$17.99

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Hydor 200W Submersible Glass Aquarium Heater - Original Theo

Hydor 200W 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

$24.99

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Hydor 400W Submersible Glass Aquarium Heater - Original Theo

Hydor 400W 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

$29.61

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Tetra HT Submersible Aquarium Heater HT10 50W (Mfg# 26447)

Tetra HT Submersible Aquarium Heater HT10 50W (Mfg# 26447)

Get a $40 Gift Certificate with Orders $125+ with code 40GCAUG

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

$9.99

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(275,000+)
Theo Heater 150 watt

Theo Heater 150 watt

Get a $40 Gift Certificate with Orders $125+ with code 40GCAUG

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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(275,000+)
Tetra HT Submersible Aquarium Heater HT30 100W (Mfg# 26446)

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

Get a $40 Gift Certificate with Orders $125+ with code 40GCAUG

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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(275,000+)
Tetra HT30 Submersible Heater 100 Watt (1030 Gal)

Tetra HT30 Submersible Heater 100 Watt (1030 Gal)

HT Submersible Heater (100 Watt)The new Tetra HT10 and HT30 submersible heaters for aquariums ranging from 2 to 30 gallons are easy to use. The electronic thermostat automatically adjusts heat output to keep the water at a constant 78F. All you have to... more

$19.86 $12.29

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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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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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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

$35.99

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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

$39.99

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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

$37.99

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50W 100W Aquariums Accessories Durable Submersible Heater Heating Rod for Aquarium Glass Fish Tank Temperature Adjustment

50W 100W Aquariums Accessories Durable Submersible Heater Heating Rod for Aquarium Glass Fish Tank Temperature Adjustment

Features: Easy to use, Safe,Precise. Fully submersible heaters work in any position (horizontal or vertical) to provide optimum aquarium water temperature. Safe and reliable in both fresh and salt water aquariums! Temperature range between 65F and 93F... more

$10.99

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Tetra Ht30 Submersible Aquarium Heater 26446

Tetra Ht30 Submersible Aquarium Heater 26446

100 watt submersible heater for tanks 10 to 30 gallonsThe electronic thermostat automatically adjusts heat output to keep the water at a constant 78 f.Glass Electrical Heat Element more

$238.89

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Tetra Ht40 Submersible Aquarium Heater 26462

Tetra Ht40 Submersible Aquarium Heater 26462

150 watt submersible heater for tanks 30 to 40 gallonsElectronic thermostat automatically maintains water temperature and prevents overheating, extending heater lifeNo adjustments are neededThe indicator light lets you know when the water is being... more

$246.14

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Tetra Ht10 Submersible Aquarium Heater 26447

Tetra Ht10 Submersible Aquarium Heater 26447

50 watt submersible heater for tanks 2 to 10 gallonsThe electronic thermostat automatically adjusts heat outputs to keep the water at a constant 78 f.Glass Electrical Heat Element more

$236.11

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Tetra Pond 100 Watt Submersible Heater - 0861-1220

Tetra Pond 100 Watt Submersible Heater - 0861-1220

Dimensions: 3.5W x 1.63D x 8.25H in.. Plastic and metal construction. Adjustable between 72 degrees and 85 degrees F. Heater indicator light. For aquariums 10 to 30 gallons. This Tetra Pond 100 Watt Submersible Heater is easy to conceal and works in... more

$17.98

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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

$67.99

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50W 100W Aquarium Mini Submersible Fish Tank Adjustable Water Heater (Water heater)

50W 100W Aquarium Mini Submersible Fish Tank Adjustable Water Heater (Water heater)

Easy to use, Safe,Precise. Fully submersible heaters work in any position (horizontal or vertical) to provide optimum aquarium water temperature. Safe and reliable in both fresh and salt water aquariums. Temperature range between 65F and 93F. Sensitive... more

$17.79

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(675,000+)
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

$39.99

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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

$41.99

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Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

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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Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

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

$58.24

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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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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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THEO Heater - 200W - Up to 53 gal.

THEO Heater - 200W - Up to 53 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

$27.99

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Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

Hydor Usa Inc. Eth300 300 Watt External In - Line Heater For 5/8" Hose Hy00019

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

$58.24

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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

FREE shipping

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Hydor 50W Submersible Glass Aquarium Heater - Original Theo

Hydor 50W 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

$19.48

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Hydor 100W Submersible Glass Aquarium Heater - Original Theo

Hydor 100W 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

$20.43

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