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Home > Fish > 8 Best Aquarium Heaters in 2024 – Review & Buyer’s Guide

8 Best Aquarium Heaters in 2024 – Review & Buyer’s Guide

Aquarium Tank heater_Huy Phan_Unsplash

Getting a reliable aquarium heater with adequate function is super important if you have fish who enjoy toasty water temperatures. For these sorts of tanks, there are so many options on the market—but how many of them will really hold up?

To cut out all the questioning, we did the hard work for you. We have rounded up 8 of the best heaters we could find—and we’re so excited to tell you about them. Check out these reviews!

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A Quick Comparison of Our Winners (2024)

Image Product Details
Best Overall
Winner
Penn Plax Cascade Heat Preset Penn Plax Cascade Heat Preset
  • Fully submersible
  • Full temperature control
  • Saltwater and freshwater compatible
  • Best Value
    Second place
    Sungrow Aquarium Heater Sungrow Aquarium Heater
  • Ideal for betta fish
  • Terrific for small tanks
  • Durable materials
  • Premium Choice
    Third place
    Cobalt Aquatics Electric Neo Cobalt Aquatics Electric Neo
  • Shutoff feature
  • .5 degree.5-degree precision
  • Compatible with a variety of setups
  • Lifegard Preset Quartz Glass Heater Lifegard Preset Quartz Glass Heater
  • Useful accessories included
  • Heat monitoring thermal sensor
  • Versatile placement
  • Eheim Jager Aquarium Thermostat Heater Eheim Jager Aquarium Thermostat Heater
  • Excellent range
  • Covers all necessities
  • Easily recalibrated
  • The 8 Best Aquarium Heaters

    1. Penn Plax Cascade Heat Preset – Best Overall

    Penn-Plax Cascade Heat Preset Submersible Aquarium Heater

    Brand: Penn Plax
    Watts: 150, 200
    Submergibility: Submersible

    Penn Plax Cascade Heat Preset is the best overall aquarium heater. We think you might agree. It comes in both 150 and 200 watts, depending on your tank size. Though it is limited, they work for most setups.

    This nifty gadget maintains your aquarium’s temperature with 1° accuracy. You can count on it to regulate the exact water temperature to keep your fish completely comfortable and safe.

    This aquarium heater is ultra programmable. You can put it at any temperature you desire without issue. However, it comes on a preset of 76°, which you will have to change depending on the aquatic life you keep.

    The heater itself is fully  submersible and compatible with both fresh and saltwater tanks. It comes fully equipped with dual suction cups to place it anywhere. You can put it vertically or horizontally.

    However, this one isn’t for small tanks as there are no low-wattage options.

    Pros
    • Fully submersible
    • Full temperature control
    • Saltwater and freshwater compatible
    Cons
    • No low-wattage options

    2. Sungrow Aquarium Heater– Best Value

    SunGrow Betta Fish & Turtle Aquarium Tank Water Heater

    Brand SunGrow
    Watts 10
    Submergibility Submersible

    If you’re a penny pincher always looking for a steal of a deal, we recommend the SunGrow Aquarium Heater. It might be a little small and only suitable for specific setups, but it’s the best aquarium heater for the money.

    This aquarium heater is specifically made for smaller tanks, so it won’t be compatible with all setups. Since betta fish require tropical temperatures, this is specifically designed for these types of aquatic life. Also, it is super compatible with tiny turtles who like heated waters, too.

    There is a limited range of heat here, And it is only compatible with rooms that are 68 to 75 degrees. When you set it up, it is preset to 75°F, but it is slightly adjustable.

    We can’t stress enough that this aquarium heater is unsuitable for homes below the temperatures we mentioned, so we recommend keeping it away from vents and other drafty spaces.

    We really loved the materials here. It is made out of a thick polymer and plastic that is incredibly durable and withstands full submersion.

    Pros
    • Ideal for betta fish
    • Terrific for small tanks
    • Durable materials
    Cons
    • Unsuitable for tanks over 10 gallons

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    3. Cobalt Aquatics Electric Neo – Premium Choice

    Cobalt Aquatics Electronic Neo-Therm Pro Submersible Aquarium Heater

    Brand: Cobalt Aquatics
    Watts: 25, 50, 75, 100
    Submergibility: Submersible

    Cobalt Aquatics Electric Neo Heater might be a little pricey, but it may be just what you’re looking for. Some perks make it very worth your attention, even if you first think it’s out of your price range. Hear us out.

    This electronic aquarium heater is entirely submersible, touting excellent features. And it’s compatible with freshwater, saltwater, and even terrariums. So, you don’t have to keep it in a single tank if you choose to switch hobbies.

    It has an incredibly advanced reading that is plus or minus .5 degrees—which is highly accurate. We also found it very pleasing that it has a circuit that will shut off if it detects the tank is getting too hot. This protects all aquatic life, which we find of utmost importance.

    We can’t help but rave about this thermostat. It did the job exactly as it claimed to do. The thermostat has a shatterproof case for optimal durability, and there is an LED light system that helps you read the thermometer accurately every time.

    However, it is relatively more expensive than most of the other thermometers on the market. Ultimately, you can decide if this is worth a few extra dollars in your own set up.

    Pros
    • Shutoff feature
    • 5-degree precision
    • Compatible with a variety of setups
    Cons
    • Pricey

    4. Lifegard Preset Quartz Glass Heater

    Lifegard Pre-Set Quartz Glass Heater Electronic Control

    Brand: Lifegard
    Watts: 25, 50, 100, 200
    Submergibility: Submersible

    We loved the Lifegard Preset Quartz Glass Heater because it’s efficient. This aquarium heater maintains a temperature of 78 degrees Fahrenheit at all times. It doesn’t change in temperature like some of the other options. However, if you have a tropical tank, it might just be what you are looking for.

    This heater has a thermal sensor that detects if the mechanism is overheating. If it senses an increase in temperature, it will automatically shut down to prevent damage to your aquatic life.

    It comes with suction cups and mounting brackets to fit your setup perfectly. We love how versatile it is, being able to fit anywhere you want to put it. The accessories are easy to include and ideal for keeping the heater in place.

    There are quite a few wattage options ranging from 20 to 200 watts of power, so you can buy one for virtually any setup.

    Pros
    • Useful accessories included
    • Heat monitoring thermal sensor
    • Versatile placement
    Cons
    • One temperature only

    5. Eheim Jager Aquarium Thermostat Heater

    Eheim Jager Aquarium Thermostat Heater

    Brand: Eheim Jager
    Watts: 50, 75
    Submergibility: Submersible

    We really appreciate the versatility of the Eheim Jager Aquarium Thermostat Heater. This thermostat heater has a wide range of temperature options available, making it extremely compatible with practically any setup. You can adjust temperatures between 64 and a whopping 95 degrees.

    This heater has all of the basic features you could want for your aquarium. It has an automatic shutoff if things start going awry and it is completely submersible, made of safe materials that will protect all those who dwell therein.

    Recalibration is a breeze, as you can set it to any temperature you like within 35 degrees of each other.

    We noticed that the temperature fluctuates at times, making it slightly inconsistent. So, we do not recommend this option for very sensitive fish.

    Pros
    • Excellent range
    • Covers all necessities
    • Easily recalibrated
    Cons
    • Slightly inconsistent

    6. Orlushy Submersible Aquarium Heater

    Orlushy Submersible Aquarium Heater

    Brand: Orlushy
    Watts: 100, 150, 200, 300, 500
    Submergibility: Submersible

    The Orlushy Submersible Aquarium Heater definitely deserves some attention. This is a very affordable heater that gets the job done. It comes in several different voltages all the way up to 500 W. So, if you have a tropical setup that is quite large, this could quite possibly heat the entire tank with ease.

    Because of its favorable price, it won’t break the bank either. So, this aquarium heater is very affordable on most budgets.

    Our favorite thing about this product was the fact that it has a 6 foot long power cord attached. This is much longer than some of the others that we had the pleasure of reviewing. This feature made it easier for homes with a bit of space and between their aquarium and an available outlet.

    In addition, it comes with an extra thermometer so you can monitor both sides of the tank, ensuring it always stays at the appropriate temperature.

    Our only bugaboo is that it claims it has a 21° degree range, and we only can confirm roughly 15.

    Pros
    • Long power cord
    • Extra thermometer included
    • Many wattage options
    Cons
    • Not as versatile as advertised

    7. Petbank Aquarium Heater

    Petbank 25W Aquarium Heater, with Temperature Remote Control and LED Temperature Display

    Brand: Petbank
    Watts: 25, 50, 100, 150
    Submergibility: Submersible

    The Petbank Aquarium Heater is a pretty nifty gadget. It has a sleek appearance with a digital temperature reading that is moderately accurate. It comes in four different wattage options to choose the one that is suitable for your setup.

    This heater comes with a remote so that  you can turn the temperature up and down as needed. The design itself is fully submersible. Once you remove it from a water source, it  immediately shuts off the LED screen display.

    We like the company’s safety precautions when they produce this aquarium heater. Inside of this component it has an anti collision plastic sheath on the outside and a shatterproof quartz tube on the inside—both of which ensure the safety of both your tank life and the product itself.

    This product contains an intelligent strip control that reads the aquarium temperatures between 64 and 91 degrees. It even has a feature that will monitor the heating rod inside in real-time to let you know when it’s time for a change.

    This isn’t as durable as some similar  products and we have to admit that it didn’t stay totally functional all the time. So, we have to give a thumbs down on accuracy.

    Pros
    • Plenty of safety features
    • LED display
    • Communicates in real-time
    Cons
    • Accuracy issues

    8. Tetra HT Submersible Aquarium Heater With Electronic Thermostat

    Tetra HT Submersible Aquarium Heater With Electronic Thermostat

    Brand: Tetra
    Watts: 25, 50, 100, 200
    Submergibility: Submersible

    We really enjoyed what the Tetra HT Submersible Aquarium Heater had to offer. This fully submersible aquarium heater has an electronic thermostat; it’s probably its best feature.

    Not only does it tell you when the temperature is all set, it also lets you know if it’s still warming up. Green means go, in this case! However, it stays at a solid 78 degrees with no wiggle room.

    Inside it has silicone carbide crystals that help with the heat distribution throughout the tank.

    We have to give a thumbs up to the marketing on this product. Sometimes you have to dig for information about how many gallons are suitable for what wattage. This has all of the information directly on the front of the package to take out the guesswork for you.

    Pros
    • Easy to understand packaging
    • Made for tropical fish
    • Contains silicone carbide crystals
    Cons
    • Only one temperature option

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    Buyer’s Guide: How to Select the Best Aquarium Heaters

    For the health and livelihood of your tank, you need a heater that will be dependable at all times. Once hiccup can have dire consequences in some cases. So, here are some feature factors to consider.

    Power

    Depending on your aquarium size, you will need a particular kind of wattage. Typically, these wattage  types range from 10 to 200 W, which is primarily based on the size of your overall aquarium and not necessarily the heat output. We need to make sure that you buy an aquarium heater that is sufficient to heat the whole tank without dropping the temperature.

    Function

    Buying an aquarium heater that doesn’t work accurately will be a literal nightmare. Depending on how sensitive the fish  are to their environment, you can lose an entire fish tank if the heater malfunctions.

    Submergibility

    Most of the aquarium heaters you will find on the market are fully submersible, but not all. If you have a preference, it’s important to read the product description to ensure you’re getting exactly what you need. It usually is in the product description, but sometimes you have to look in the specs to be able to know for sure.

    Features

    Certain features make heaters more attractive, like well-made heater cores and tough outer materials built to last. Be sure to check all the specs of your particular favorite before purchasing.

    Some options have LED lights to display the temperature or shatterproof casing for optimal ease and safety—the list goes on. You just have to find a product with the best features for your setup.

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    Conclusion

    Our favorite remains the same when it comes to everything you can consider for an aquarium heater—the Penn Plax Cascade Heat Preset. This heater has many different wattage options, range of temperature, and durability on its side. We don’t think that you’re going to have a problem with any setup, fresh or saltwater. But only you can decide if that’s also your number one pick off our list.

    If affordability appeals more to you, and you have a small setup, we still have to recommend the SunGrow Aquarium Heater. This heater is made for smaller tanks that suit betta fish and some aquatic turtles. It completely gets the job done in the right circumstances, even though it won’t work for bigger setups.

    We understand that everyone’s needs will be different, so we can’t tell you precisely what to purchase. We know that we have covered at least one product that might fit the bill based on your circumstances. Remember to use all of our tips and tricks on purchasing to ensure that your aquarium life stays safe and lives in the appropriate temperature for the species.


    Featured Image Credit: Huy Phan, Unsplash

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