Best Inline Heater In December 2022

Looking for some of the inline heater? As you may know, there are dozens of brands available in the market such as ISTA,DaToo,Hydor,CORISRX BEST OF YOUR LIFESTYLE,FEENGG and some come with vastly different price tags. Let us help you out here – we have handpicked for you the best inline heater.

To compile our list of the best inline heater, we've researched and evaluated a range of the best-selling inline heater on the market. We recommend ISTA Inline Heater as our top pick because of its best overall performance. Want to explore more options? Read on! There's also a buying guide to help you make a wise shopping decision.

Editor's Choice
In-Line External Heater Aquarium Heater</h3>    ISTA    2.30 x 9.00 x 2.30 inches    Best Inline
9.7
In-Line External Heater Aquarium Heater ISTA 2.30 x 9.00 x 2.30 inches Best Inline
Premium Pick
DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W</h3>    DaToo    Best Inline
9.4
DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W DaToo Best Inline
Budget Pick
Hydor ETH 300 In-Line External Aquarium Heater</h3>    Hydor    T08203    4.00 x 4.00 x 12.50 inches
9.1
Hydor ETH 300 In-Line External Aquarium Heater Hydor T08203 4.00 x 4.00 x 12.50 inches

Top 10 Best Inline Heater Reviews 2022

1. In-Line External Heater Aquarium Heater</h3> ISTA 2.30 x 9.00 x 2.30 inches Best Inline

  • There is no danger of damage if the ISTA External Heater is left running dry for short periods as the ISTA External Heater will switch itself off in that event. The ISTA External Heater heats with high efficiency by means of an internal heat pump system that avoids temperature variations. For use in freshwater and marine aquariums. Fits most canister filters.
  • The ISTA External Heater is easily installed by cutting the tubing and connecting the two parts of the tube to each side of the ISTA External Heater.For reduced maintenance, it is recommended that the ISTA External Heater be installed within the filter`s output assembly. As most canister filters are not designed to bear weight, it is recommended that the ISTA External Heater be properly supported by the use of the attached loop to avoid stress on the output assembly.
  • The ISTA in-line external heater is designed for vertical use in most aquarium applications involving water hose of the specified diameter.
  • The ISTA External Heater is completely safe and UL Listed.
  • The ISTA External Heater must be used in a vertical manner for correct operation. The most common application is for use with canister filter, however the ISTA External Heater is easily adapted for use in almost any situation where heated aquarium water is required, such as with wet/dry sump pumps.

2. DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W</h3> DaToo Best Inline

  • Replaceable Inlet And Outlet: For different Canister Filter needs, we have prepared three different sizes of inlet and outlet heads in the box, 1/2" (12mm), 5/8" (16mm) and 20mm. You can choose a appropriate head as needed. A cleaning brush is also in the box and you can use it to clean the inside of the heater. DaToo has prepared everything for you. No extra purchases, save your money!
  • Sturdy & Durable & One Year Warranty: Heating tube is made of German imported glass-ceramic, which is explosion-proof, shatterproof and very durable. The shell of the DaToo Aquarium External Heater is made of super-strong ABS plastic, which makes it unafraid of any external forces, nearly indestructible. The service life is 1.5 times that of similar products. One Year Warranty and 100% Money-back Guarantee, let you rest assured to choose our products. JUST DO IT, Let't Go!!
  • Leading Temperature Control System: For the health of fish, a precise and constant temperature is very important. DaToo Heater's temperature control system uses advanced STM8 chip, which ensures that DaToo has a precise and perfect temperature control over the 68 ℉ to 95 ℉ range. Just set the temperature that you need, DaToo will create a comfortable environment for your beloved fish. Very Easy! Clear and large LED display, only need a light glance, you can know the current water temperature.
  • Perfect Aquarium External Heater For Your Needs: For every hobbyist or professional fish breeder with a canister filter, a perfect external heater is essential. DaToo Aquarium External Heater is specially designed for canister filter. Leading temperature control system, precise overheat protection, provides a warm, safe and comfortable living environment for your beloved fish!!
  • Safe Over-Heat Protection: DaToo Aquarium External Heater has two temperature sensors, one at the heater inlet and the other at the outlet. This makes DaToo heater can be more accurate to measure temperature change. When the temperature exceeds the set temperature by 0.2 ℉, the heater immediately stops heating, the maximum to protect the safety of the lovely fish.

3. Hydor ETH 300 In-Line External Aquarium Heater</h3> Hydor T08203 4.00 x 4.00 x 12.50 inches

  • For external use
  • High precision electronic temperature control
  • Suitable for marine and tropical aquariums
  • 5/8 inch hose
  • Easy to use

4. CORISRX 150w/300w/500w in-Line External Heater Aquarium Heater</h3> CORISRX BEST OF YOUR

CORISRX 150w/300w/500w in-Line External Heater Aquarium Heater</h3>    CORISRX BEST OF YOUR
9.8
By - CORISRX BEST OF YOUR LIFESTYLE
  • The most common application is for use with canister filter, however the External Heater is easily adapted for use in almost any situation where heated aquarium water is required, such as with wet/dry sump pumps.
  • There is no danger of damage if the External Heater is left running dry for short periods as the ISTA External Heater will switch itself off in that event. The External Heater heats with high efficiency by means of an internal heat pump system that avoids temperature variations. For use in freshwater and marine aquariums. Fits most canister filters.
  • The External Heater is completely safe and UL Listed.
  • The in-line external heater is designed for vertical use in most aquarium applications involving water hose of the specified diameter.
  • Power: 150W, Applied sizes: 5/8"(16/22mm), 1/2"(12/16mm), can be applied to both sizes

5. FEENGG Aquarium External Heater in-Line Fish Tank External Heater 300W</h3> FEENGG Best Inline

  • [Overtemperature protection]: Water temperature is 34 ° C, prevent if the stop heating is exceeded, fish.keeping boiling your pet's fish staying in a healthy and safe environment ..
  • [Display Design LED]: External electronic theromstat, it clearly shows one of your Celsius temperature settings LED display ..
  • [Temperature range]: Accurate temperature adjustment from 68 ℉ to 93 ℉ ..
  • [Intelligent Temperature Detection]: Dual temperature probe, accurate temperature control ..
  • [High Quality]: Effectively prevents the shell from being damaged, deformed or softened by fish or turtles, without internal ceramic heating element, formed from high heat resistant ABS material.

6. ISTA I-H615 300W Inline External Heater</h3> ISTA I-H615 3.50 x 5.80 x 10.90 inches

  • 2 temperature sensors, two sensors to exam the temperatures of water (Inlet and outlet)
  • Displayed in Celsius
  • External design, easy to install and does not occupy space in the Tank
  • Thermal spraying glass, faster heating process
  • Power: 300W

7. Fluval E300 Advanced Electronic Heater</h3> Fluval A774 3.30 x 1.80 x 18.20 inches 0.82

  • Equipped with a slim profile mounting bracket and colored display alert system
  • Aquarium heater with dual temperature sensors provide accurate and real-time water temperatures
  • LCD temperature display available in both Fahrenheit and Celsius; with a range of 68 to 93 degrees Fahrenheit
  • Fast heat technology built with a safety shut-off and integrated fish guard to protect fish and invertebrates

8. hygger Fast Heating Titanium Aquarium Heater</h3> hygger

  • Build-in external IC temp controller, easy to read LED digital number shows real time water temperature. Temp accuracy is +/- 1°F.
  • Made with premium titanium and double sealed by black protective guard, this fish tank heater is resistant to explosion, and protect fish and other livestocks from punching and scalding
  • Easy to set temperature without getting hands wet. Build in hand button, Keep pushing the button. It will cycle through all the set temperatures. Temperature can be precisely adjusted from 70 to 94°F
  • This fully submersible aquarium heater enables memory function and over heat protection. Auto shut off when over-heats, resets when it cools down
  • 800 watt aquarium heater, voltage 110-120V, suitable for tank capactiy 120-180 gallon freshwater and turtle aquariums

9. Inkbird ITC-306A WiFi Temperature Controller</h3> Inkbird Aquarium Heaters for Reef Tank

  • [Two Probes] Your fish might be in danger as it is hard to know the probe is broken immediately if the temperature controller has only 1 probe. The dual probe aquarium temperature controller will alarm if the temperature difference between 2 probes is bigger than 3℃/5℉, and the INKBIRD app will push a notification at the same time.
  • [APP Notification] Pair the aquarium temperature controller with your phone via 2.4GHz Wi-Fi, the device will alarm if there are exceptions. And all exceptions will be updated to the INKBIRD APP, the INKBIRD app will push notifications to remind you.
  • [Plug and Play] The 1100w high-power aquarium temperature controller is compatible with most kinds of heaters, you don't need to assemble the product yourself, just plug and play.
  • [Continuous Heating Alarm] The heating time can be set according to your needs from 1 hour to 72 hours, the controller will alarm if water can not be heated to the setting temperature within the specified time. The temperature setting range is 20.0℃~35.0℃/68.0℉~95.0℉ and the detectable temperature range is -40℃~100℃/-40℉~212℉.
  • [Dual Protection] The aquarium temperature controller is equipped with 2 relays to ensure that the power can be turned off under any circumstances, this will protect your fish from being hurt by overheated water. (US Socket Only)

10. Marineland Precision Heater for Saltwater or Freshwater Aquariums</h3> MarineLand ML90648

  • Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location.
  • The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability
  • This 50 watt heater is for aquariums up to 12 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.
  • Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
  • Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.