For keeping the water in your 50-55 gallon fish tank in an optimal and stable temperature range, a 200 watt aquarium heater is the right choice. However, there are a lot of dedicated aquarium heaters on the market today that makes you a little hard to know which is the best unit for your aquatic friends. Know that, I have collected some of the best 200W aquarium heaters which come from various types with different unique features in this article for you to choose.

Aqueon Pro Heater 200W for 50-55 gallon fish tanks

  • Aqueon Pro Heater 200W5 star rating (5/5 by editor)Check on Amazon.com
  • Type: fully submersible
  • Wattage: 200W
  • Temperature range: 68 to 88°F, accurate to ±1°F
  • Special features: indicator light, auto shut-off
  • Used for: 50-55 gallon fish tanks, both saltwater or freshwater.

This is one of the best and most purchased aquarium heaters in the market. The Aqueon Pro Heater is made from a superior quality material that enables it to function well in both fresh and saltwater aquariums. It is fitted with an electronic thermostat and a temperature dial control knob that enable you to put up accurate temperature settings for your fish.

The heater is fully submersible and can be fully immersed in your aquarium without the fear of it breaking down. The unit is also shatterproof and nearly indestructible, even in saltwater environments. It is designed with an auto shut-off to protect itself against abnormal working situations like running dry. It has a power monitor light that enables you to know its working status from the outside.

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Cobalt Aquatics Neo-Therm Heater, 200 watt

  • Cobalt Aquatics Neo-Therm heater 200W5 star rating (5/5 by editor)Check on Amazon.com
  • Type: fully submersible
  • Wattage: 200W
  • Temperature range: from 66°F to 96°F, ±0.5°F
  • Ideal for: 50-55 gallon fish tanks, both fresh or saltwater
  • Warranty: 3 year.

If you are finding a heater that can provide the most precise temperature range for your fish tank, the Cobalt Aquatics Neo-Therm heater is the best option with its accuracy to ±0.5°F. The unique design makes the heater easy to handle and work with. By simply pressing a button on its top, you can set your desired temperature. It allows you to select a temperature in a broad range from 66 to 96 degree Fahrenheit. So, you can choose the best one that is suitable for all types of organisms in your fish tank. When the heater is running, both the set temp and the actual water temp are showed on its LED display system. This helps you to know the working status of the heater.

The Cobalt Aquatics Neo-Therm heater is manufactured with a thermal protection circuitry for an auto shut-off feature that protects the heater from overheating. The heater is also durable and indestructible with its shatterproof outer casing. It comes with suction cups for easy installation. The heater should only be placed vertically in your tank and it is fully submersible.

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Finnex Electronic controller with 200W titanium tube

  • Finnex Electronic heater controller4.5 star rating (4.5/5 by editor)Check on Amazon.com
  • Type: heater controller with heating tube
  • Wattage: 200W
  • Temperature range: 70-92°F, accurate to ±2°F
  • Other features: indicator lights for heater and power
  • Used for: aquariums up to 80 gallons, both saltwater and freshwater.

This is a special kind of an aquarium heater that includes a controller and a titanium heating tube. This heater works by the combination of the controller placed outside the aquarium and the titanium submerged in the inside aquarium water. The controller allows for temperature adjustments while the heating tube heats the water to the temperature that is set in the controller. The controller has a LED heating indicator which helps you to know when it is working.

This heater has a capability of maintaining your aquarium water in a stable temperature range within ±2°F of the set temperature, thus providing a healthy and conducive environment for your fish. The titanium tube is corrosion resistant and can last a decade without facing breakage. It comes with a protective heater guard that prevent your fish from contacting the heating core. Suction cups are also attached on the protective guard for you to position the heating tube in a proper place in your tank.

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EHEIM Jager aquarium thermostat heater, 200-watt

  • EHEIM Jager aquarium thermostat heater4.5 star rating (4.5/5 by editor)Check on Amazon.com
  • Type: fully submersible
  • Wattage: 200 watts
  • Temperature range: 65°F to 93°F
  • Other features: On/Off indicator light, thermo-safety control
  • Rated for: 79-106 gallons
  • Other sizes: 50-300W.

This EHEIM Jager heater features an innovative TruTemp technology with a readjustment ring that allows you to adjust the heater precisely to your desired temperature. There is an on/off indicator light which indicates when the heater is working. Another unique feature is the thermo-safety control, which automatically switches off the heater when out of the water, hence protecting it from damages of running dry.

The heater is made of rigid special laboratory glass, which is shockproof and shutter-resistant. It is fully waterproof, fully submersible and UL-approved. It comes with a long cable, a clamp, and two suction cups for easy installation. The Jager 200 watt is recommended to use in aquariums from 79 to 106 gallon.

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Hydor In-Line External Heater 200 watt

  • Hydor In-Line External Heater5 star rating (5/5 by editor)Check on Amazon.com
  • Type: in-line external heater
  • Hosing: many options for choice
  • Wattage: 200W
  • Temperature range: 18-34°C
  • Used for: both marine and tropical aquariums.

Unlike other aquarium heaters in this list, the Hydor in-line external heater is meant for external use only. It is recommended to install this heater in the return hose of your filter, it could be a canister filter or a Wet/Dry sump filtration system. This in-line heater will heat the water that goes though its internal hose. By this way, the water is heated to a desired temperature before it is returned to the aquarium. This also ensure that the heated water is distributed thoroughly to your entire aquarium.

This heater can be used for both marine and tropical aquariums. It is easy to use as it has a friendly user interface. The product features a high precision electronic temperature control which allows you to pick a precise temperature for your fish. You do not have to worry about overheating because its self-limiting PTC heating element ensures maximum safety against any risk of this problem.

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Fluval E electronic heater 200-watt for 50-60 gallon tanks

  • Fluval E Electronic Heater, 200-watt4.5 star rating (4.5/5 by editor)Check on Amazon.com
  • Type: fully submersible
  • Wattage: 200 watts
  • Temperature range: 68 to 93°F
  • Other features: Fahrenheit and Celsius reading, colored display alert system
  • Ideal for: 50-60 gallon aquariums
  • 5 year warranty.

The Fluval E Electronic heater is equipped with dual temperature sensors that allows for very accurate and real-time temperature control. It features a colored display alert system for easier monitoring of its functionality. It offers two options for temperature reading in both Fahrenheit or Celsius. It supports a temperature range from 68 to 93 degrees Fahrenheit.

The LCD display system is a unique feature of this model. It displays real time water temperatures during normal operation. The LCD display is also able to change its color to alert you when the temperature varies over 2 degrees F from the pre-set one. This alert feature helps to remove any potential risks of temperature fluctuations for your aquatic pets.

The heater features a fast heat technology built with a safety shut-off and a fish guard to provide an optimal and healthy environment for your aquatic pets. This product is also fully equipped with a slim profile mounting bracket for easy installation. The heater is rated for tanks up to 65 gallons, so you use it well in a 50/55/60 gallon aquarium.

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Fluval M submersible heater 50W for up to 65 gallon tanks

  • Fluval M Submersible Heater 200W4.5 star rating (4.5/5 by editor)Check on Amazon.com
  • Type: fully submersible
  • Wattage: 200W
  • Temperature range: 19-30°C
  • Special features: borosilicate glass enclosure with reflective technology
  • Used for: up to 65 gallon fish tanks.

The Fluval M submersible heater features built-in reflective technology which reflects the surrounding colors, thus making the heater blend into the aquarium environment. Its heating core is fitted with a high density ceramic heat sink for better heating efficiency and distribution. Its thermostat is well calibrated for more precise temperature settings.

This Fluval M submersible heater is strong and durable. Its enclosure is made with borosilicate glass for shock resistant. It does not give the users a hard installation time as it doesn’t have complicated features. Only turning the dial control on its top to the temperature you want. You can pick a temperature in the range from 19 to 30 degrees Celsius with the dial control.

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